Developer Tools

Generate .env and .env.example files from framework templates for Next.js, Node.js, Django, FastAPI, Laravel, and more. Auto-generates cryptographically random secrets.

Convert .env environment variable files to JSON format instantly. Parse KEY=VALUE pairs, handle quoted values, auto-detect types like numbers and booleans, and export clean JSON for configuration management.

.gitattributes generator creates line-ending rules, binary file markers, Git LFS patterns, and language stats overrides for Node.js, Python, Go, and more. Free, no signup.

Generate a .gitignore file by selecting your tech stack. Supports Node.js, Python, Java, React, Go, Rust, and 20+ more frameworks.

Look up A DNS records for any domain and verify IPv4 address mapping with TTL values. Instantly check DNS A record propagation and IP assignments.

Look up AAAA DNS records for any domain and verify IPv6 address mapping with TTL values - free, browser-based, no data stored.

Generate ads.txt files for publishers with DIRECT or RESELLER seller lines, optional owner and manager directives, and instant copy or download.

Calculate your exact age in years, months, days, hours, and minutes. Find your zodiac sign, day of birth, and countdown to next birthday.

Wondering is your website AI ready? Scan robots.txt, markdown negotiation, bot rules, and MCP/agent protocol signals in seconds. Free instant report, no signup.

Block GPTBot, ClaudeBot, CCBot, and other AI crawlers from scraping your website with a ready-to-use robots.txt generator. Free, browser-based, no signup needed.

Generate .cursorrules, CLAUDE.md, and .windsurfrules config files for your project in seconds. Configure your tech stack once and get AI coding assistant rules for Cursor, Claude Code, and Windsurf.

Estimate token count for GPT-5, Claude 3, Gemini, and Llama models. Paste any text to see token usage and estimated API cost instantly.

Calculate the right tip for alcohol and beer delivery orders. Factor in heavy cases, delivery distance, minimum tip, and bill splitting for Drizly, Instacart, and liquor delivery. Free, instant, no signup.

Find all anagrams of any word and check if two words or phrases are anagrams of each other. Instant results using a built-in word list. Free online anagram tool.

Generate ANSI escape code sequences for terminal text colors and styles. Preview colored output and copy bash, Python, or Node.js color codes instantly. Free, browser-based.

Generate Apache HTTP Server VirtualHost configurations for HTTP and HTTPS. Add SSL, proxy pass, and custom headers. Free Apache config generator, no signup required.

API key generator that creates cryptographically secure keys in your browser with crypto.getRandomValues. Set a prefix, length, and character set, generate up to 100 at once, see entropy in bits.

Test and validate API keys for OpenAI, Anthropic, Google AI, and other services. Secure validation without storing keys on our servers.

App icon generator resizes one logo into every iOS, Android and PWA icon size, with AppIcon.appiconset, Contents.json and mipmap folders in one ZIP. Free and private.

Area converter for metric and imperial units - square feet to meters, acres to hectares, and more. Free, no install needed.

Complete ASCII table with all 128 characters. View decimal, hex, octal, and binary values. Search, filter by category, copy characters, and export as CSV.

Ascii85 encoder and decoder with Adobe, btoa and RFC 1924 Base85 variants. Built for PDF streams and Git binary patches. Free, runs in your browser.

Calculate aspect ratios, scale dimensions proportionally, and find dimensions from any ratio. Perfect for video, image, and screen resolution calculations.

Estimate your personalized autophagy onset based on hours fasted, experience level, age, and exercise. See your current fasting phase, milestone tracker, and tips to accelerate cellular repair.

Calculate the mean, median, mode, and range of any set of numbers. Paste or type your numbers, get instant statistical results with a clear breakdown and data summary.

Convert AVIF images to JPG online for free. Adjust JPEG quality, flatten transparency onto a solid background, and export browser-friendly image files instantly.

Parse any AWS ARN into partition, service, region, account ID, and resource, or build a valid ARN from scratch. Free, browser-based, no signup required.

Generate AWS IAM policy JSON documents online. Add multiple statements with Allow or Deny effects, service actions, and resource ARNs. Free, runs fully in your browser.

Estimate your blood alcohol content (BAC) using the Widmark equation. Enter weight, gender, drinks consumed, and time elapsed to calculate current BAC level, impairment status, and time to sober up.

Barcode generator supporting Code128, EAN-13, UPC-A, Code39, and ITF formats. Download as PNG or SVG, free and browser-based.

Encode text to Base32 or decode Base32 strings back to UTF-8. Supports RFC 4648 alphabet, optional padding, copy, and download.

Encode UTF-8 text to Base58 or decode Base58 strings used in crypto wallets and compact IDs - browser-based, no data leaves your device.

Encode numbers or text to Base62 and decode strings back instantly in your browser. Ideal for URL shorteners and short IDs. Free, no signup, bulk conversion.

Free online tool to encode or decode Base64 data. Fast, private, and easy to use with no login required. All processing happens in your browser.

Convert Base64 strings to images instantly. Visualize Base64 image data and download as image files. Support for PNG, JPG, GIF, WebP, and SVG.

Base64 to PDF converter decodes Base64 strings into a viewable PDF and encodes PDF files back to Base64. Runs entirely in your browser, no upload, no signup.

Encode or decode URL-safe Base64 strings used in JWTs, OAuth tokens, and signed URLs - runs in your browser, no data sent.

Format and beautify bash and shell scripts instantly in your browser. Auto-indent if, for, while, case, and function blocks, preserve here-docs, and trim trailing whitespace. Free, private, no upload.

Generate production-ready bash script boilerplate with strict error handling, argument parsing, color logging, and cleanup traps. Configurable features. Free, browser-based, no signup.

Basic auth header generator builds the Authorization: Basic header from a username and password, with curl and fetch snippets, and decodes existing headers back to credentials.

Bcrypt generator hashes passwords with a chosen cost factor and verifies existing bcrypt hashes in your browser. Compatible with PHP, Node, Python and Spring. Free, no signup.

Check BIMI DNS records and parse logo and authority directives to validate brand indicator setup for email clients - free to use.

Convert binary numbers (base-2) to decimal numbers (base-10) instantly. Supports large binary numbers, batch conversion, and handles 0b prefix automatically.

Convert text to Binary, Decimal, Octal, and Hexadecimal formats. A comprehensive tool to translate text into various computer number systems.

Find out your biological age based on 7 key lifestyle factors: BMI, exercise, sleep, smoking, diet, stress, and alcohol. Compare to your chronological age and get a personalised factor breakdown.

Birthstone calculator shows the modern and traditional birthstone for any birth month, with its color, Mohs hardness and care notes. Free, no signup required.

Calculate bitwise AND, OR, XOR, NOT, and shift operations on integers. See results in decimal, hex, and binary with 8, 16, or 32-bit width. Free online bit manipulation tool.

Blood type calculator shows which ABO and Rh blood types a child can inherit from two parents, with probability ranges and the types that are impossible. Free, no signup.

Calculate your Body Mass Index (BMI) instantly. Get health category, healthy weight range, and personalized insights based on your height and weight.

Estimate your basal metabolic rate and daily maintenance calories using the Mifflin-St Jeor formula. Supports metric and imperial units for accurate TDEE planning.

Estimate body fat percentage using U.S. Navy measurements. Get fat mass, lean mass, and category instantly for fitness tracking.

Braille translator converts text to Unicode braille and back using Grade 1 English Braille, with capital and number signs plus a dot-pattern chart. Free, no signup.

Guided breathing exercises with animated visual cues. Practice Box Breathing, 4-7-8, Wim Hof, Deep Breathing, and Resonant Breathing with audio phase cues and session tracking.

Look up browser and HTTP error codes - ERR_SSL_VERSION_OR_CIPHER_MISMATCH, 502 Bad Gateway, ERR_NAME_NOT_RESOLVED, and more. See causes and step-by-step fixes.

See live browser details including user agent, platform, language, screen size, viewport, online status, and device capabilities.

Assess your workplace burnout risk with 15 questions based on the Maslach Burnout Inventory (MBI-GS). Get a score, six-dimension breakdown, and actionable recovery steps.

Calculate business days between dates or add/subtract working days. Supports US Federal holidays, custom holidays, and weekend configurations.

Calculate monthly payments, interest cost, origination fees, and payoff savings for a business loan with optional extra monthly payments.

Generate creative, brandable business name ideas instantly. Choose from modern, classic, creative, tech, or luxury styles. Enter a keyword for targeted results.

Check a domain's CAA DNS records to see which certificate authorities can issue SSL certificates - free tool, no account required.

Generate a Caddyfile for the Caddy web server with automatic HTTPS, reverse proxy, static file serving, and custom headers. Free, no signup, runs in your browser.

Encrypt or decrypt text with the Caesar cipher. Choose any shift from 1-25, use ROT13 instantly, and copy the result in one click.

Calculate Compound Annual Growth Rate (CAGR) for your investments. Find the annualized return rate between beginning and ending values over a time period.

Calculate your daily calorie needs based on age, gender, height, weight, and activity level. Get personalized targets for weight loss, maintenance, or muscle gain with macro breakdown.

Calculate calories burned during any exercise using MET values from the Compendium of Physical Activities. Covers 30+ activities including walking, running, cycling, swimming, sports, and daily tasks.

Generate canonical link tags for preferred URLs and avoid duplicate content indexing issues across parameter and variant pages.

Cat age calculator converts cat years to human years using the AAHA and AAFP feline guidelines, and reports the matching life stage. Free, runs in your browser.

Decode an X.509 PEM certificate to view its subject, issuer, validity, serial number, public key, SANs, and SHA-1/SHA-256 fingerprints. Private, client-side decoding.

Convert conventional git commit messages into a formatted CHANGELOG.md instantly. Supports Keep a Changelog, GitHub Release Notes, and Simple formats. Free, browser-based, no signup.

Count characters, words, sentences, and paragraphs in real time. Check text against platform limits for Twitter, Instagram, YouTube, SEO meta tags, SMS, and Google Ads.

chmod calculator converts Linux file permissions between octal (755) and symbolic (rwxr-xr-x) formats visually. Free, browser-based, and no login needed.

Discover your chronotype with a 10-question quiz based on Dr. Breus's sleep science framework. Get your ideal wake time, peak productivity window, best exercise time, and the perfect IF eating window for your biology.

Test how fast you can click with this free CPS (Clicks Per Second) test. Choose from 5s, 10s, 30s, or 60s durations and track your personal best click speed score.

Check CNAME DNS alias records for subdomains and verify canonical host targets. Useful for debugging CDN, custom domains, and subdomain redirects.

Turn code snippets into beautiful images. Choose from multiple themes, languages, and backgrounds. Export as PNG for sharing on social media.

Simulate how people with color vision deficiencies see your images. Apply 6 scientifically accurate vision filters - Protanopia, Deuteranopia, Tritanopia, and more - entirely in your browser.

Convert color codes between HEX, RGB, HSL, HSV, and CMYK formats instantly. Pick colors visually and copy values with one click.

Check color contrast ratios for WCAG 2.1 accessibility compliance. Validate AA and AAA requirements for text and UI components.

Mix any two colors by blending them at a custom ratio and get the resulting HEX, RGB, and HSL values instantly. Perfect for creating color palettes, gradient stops, and accessible UI mid-tones.

Find the exact name of any color from its HEX or RGB value. Get color name, closest named color, HSL, HSV, and CMYK values instantly.

Generate beautiful color palettes using color theory. Choose from complementary, analogous, triadic, split-complementary, tetradic, and monochromatic harmonies. Export as CSS or Tailwind config.

Professional color picker tool with multiple format support, palette management, and advanced color manipulation features. Perfect for designers and developers.

Generate tints and shades from any color. Create a full color scale and export as CSS variables, Tailwind config, or SVG palette. Free online tool.

Find the nearest Tailwind CSS color class for any hex, rgb(), or hsl() color. Matches against the full Tailwind v3 palette and shows the top 12 closest colors with swatches and class names.

Common ports lookup: search 96 well-known TCP and UDP ports by number or service name. Shows whether each port is safe to expose to the internet and why not. Works offline.

Calculate compound interest on savings and investments. See how your money grows over time with monthly or yearly compounding and regular contributions.

Parse and build database connection strings for PostgreSQL, MySQL, MongoDB, and Redis instantly in your browser. Extract host, port, credentials, and query params. Free, no signup.

Build conventional commit messages with the correct format instantly. Supports feat, fix, chore, docs, refactor types with scope, breaking changes, and footer notes. Free, browser-based.

Convert PNG, GIF, WebP, TIFF, SVG, HEIC, and other image formats to JPG. Batch convert multiple images with adjustable quality settings.

Convert JPG/JPEG images to PNG, WebP, GIF, or BMP formats. Batch convert with adjustable quality settings. Free online converter.

Generate CORS headers and middleware code for Express.js, FastAPI, Nginx, and Django. Configure allowed origins, methods, headers, and credentials instantly in your browser.

CORS tester checks whether a URL allows cross-origin requests from your browser, and explains exactly why a request was blocked when it fails. Free, no signup.

Assess your cortisol load with 15 symptoms across energy, sleep, weight, mood, digestion, and immunity. Get a score, dimension breakdown, and evidence-based recommendations including your optimal IF eating window.

Calculate cosine similarity, dot product, and Euclidean distance between two vectors instantly. Built for embeddings, RAG pipelines, and ML similarity scoring. Free tool.

Create countdown timers to any date or event. Track time remaining in days, hours, minutes, and seconds. Perfect for deadlines, events, and holidays.

Resolve ISO country codes to retrieve metadata including region, income level, and capital city in one lookup - runs entirely in your browser.

Look up detailed information for any country worldwide - capital, population, area, currencies, languages, timezones, flag, and ISO codes instantly.

Look up detailed information about any country - capital, population, area, languages, currencies, timezones, and flag. Powered by the REST Countries API.

Generate a professional cover letter in seconds. Fill in your details and get a polished, ready-to-send cover letter tailored to any job application.

Calculate CPM (Cost Per Mille), CPC, CTR, and eCPM for advertising campaigns. Essential tool for marketers, publishers, and advertisers.

Calculate the CRC32 checksum of any text online. Returns the standard CRC-32/ISO-HDLC value used by zip, gzip, and PNG as hex and decimal. Free, instant, and fully client-side.

Validate credit card numbers using the Luhn algorithm. Detect card types including Visa, Mastercard, American Express, Discover, and more.

Generate cron expressions visually. Interactive UI for configuring minutes, hours, days, months, and weekdays for job scheduling.

Parse cron expressions into plain English descriptions, field breakdowns, and validation feedback without making any server request.

Cron next run calculator shows the exact times a cron expression fires next, in your local zone, UTC, or any IANA time zone, with DST gotchas flagged. Free, no signup.

Check live cryptocurrency prices for the top 500 coins by market cap. Displays real-time price, 24h change, market cap, and trading volume via the free CoinGecko API. Export data as JSON for developer workflows.

Analyze a Content-Security-Policy header for unsafe directives like unsafe-inline, unsafe-eval, and wildcard sources. Get instant security warnings. Free, client-side, no signup.

Build Content-Security-Policy headers and meta tags with common directives, reporting options, and quick security warnings.

CSR decoder reads the subject, public key algorithm and size, and requested SANs from a PEM certificate signing request, and verifies its self-signature. Free, no signup.

Format and beautify CSS code with customizable indentation, brace style, and selector formatting. The opposite of CSS minifier.

Create perfect rounded corners with visual editor. Generate CSS border-radius for all corners individually or uniformly with support for pixels and percentages.

Generate CSS box shadows with visual editor. Create single or multiple shadow layers with control over offset, blur, spread, and color.

Generate responsive CSS clamp() values for fluid typography, spacing, padding, and layout sizes without manual viewport math.

Create custom CSS clip-path shapes with visual editor. Generate circles, ellipses, polygons, and inset shapes for creative web designs.

Build and preview CSS container queries live with a resizable @container playground. Generate copy-ready code client-side, free, no signup, for responsive components.

Create stunning 3D CSS cubes with visual editor. Generate complete HTML and CSS code for interactive 3D cube animations.

Visually generate CSS cubic-bezier() easing functions for animations. Adjust control points with sliders, pick from presets like ease, bounce, and elastic, preview the animation live, and copy the CSS value.

Generate CSS filter effects with a live visual preview. Adjust blur, brightness, contrast, grayscale, hue-rotate, sepia, and more - then copy the ready-to-use CSS code instantly.

Interactive tool to learn and experiment with CSS Flexbox layouts. Visualize flex container and item properties in real-time.

Create stunning glassmorphism effects with visual editor. Generate modern glass-like UI elements with backdrop blur, transparency, and customizable properties.

Create beautiful CSS gradients with visual editor. Generate linear, radial, and conic gradients with multiple color stops and customizable angles.

Create beautiful gradient text effects with CSS. Customize colors, direction, font size, and weight with a live preview. Copy CSS or HTML code instantly.

Create CSS Grid layouts visually with interactive controls. Customize columns, rows, gaps, and item spans with live preview and instant code generation.

CSS keyframe animation generator lets you build complex animations visually with real-time preview. Adjust timing, easing, and properties, then copy the code.

CSS keyframes generator builds @keyframes animations visually with live preview, easing curves, and duration control. Copy ready-to-use CSS. Free, no signup.

Generate pure CSS loading animations - spinners, dots, pulse, bars, ripple, and ellipsis. Customize color, size, and speed. Copy CSS and HTML instantly.

CSS media query generator builds responsive breakpoints visually with a live preview at every screen size. Copy ready-to-use media queries. Free, no signup.

Free online tool to minify CSS code to reduce file size. No registration required - secure, fast, and easy to use. Built with privacy in mind.

Create stunning neumorphic / soft UI CSS effects with a visual editor. Customize color, shadows, blur, size, and shape - then copy the ready-to-use CSS code instantly.

CSS scrollbar generator builds custom scrollbar styles with a live preview, covering webkit scrollbar rules plus Firefox scrollbar-width and scrollbar-color. Free tool.

CSS selector tester matches your selector against pasted HTML and highlights every element it selects instantly. Debug selectors before shipping. Free, browser-based, no signup.

CSS selector to XPath converter for Selenium, Playwright and Scrapy: converts classes, attributes, combinators and pseudo-classes, and turns simple XPath back into CSS.

Calculate the specificity of any CSS selector. See the (a,b,c,d) breakdown for IDs, classes, attributes, and elements instantly.

Create stunning CSS text shadow effects with a visual editor. Generate single or multiple text shadows with customizable offset, blur, and color. Preview in real-time and copy the CSS code.

Convert CSS stylesheets to React Native StyleSheet.create() syntax instantly. Handles px to number conversion, margin and padding shorthands, box-shadow, and unsupported property warnings.

Convert flat CSS to nested SCSS syntax instantly. Transform repetitive selectors into clean, maintainable SCSS with proper nesting, &-references for pseudo-classes and modifiers, and preserved media queries.

Convert plain CSS code into Tailwind CSS utility classes instantly. Paste your CSS and get equivalent Tailwind classes with live preview.

CSS transform generator builds translate, rotate, scale, skew and 3D perspective rules with a live preview and copyable CSS. Free, runs in your browser.

Build CSS transition declarations visually. Set property, duration, timing function, and delay, then preview the animation and copy the CSS.

Create pure CSS triangles using border tricks. Generate triangles pointing in any direction with customizable size and color.

CSS unit converter for px, rem, em, vw, vh, and % with custom base font size and viewport settings - runs entirely in browser.

Extract, reorder, and filter CSV columns online. Upload files up to 200 MB or paste CSV directly. Select which columns to keep, reorder them, and download the result. Free, browser-based.

CSV diff checker compares two CSV files row by row and shows added, removed, and modified cells with key column matching. Free, private, all in your browser.

Merge multiple CSV files into one clean output in seconds - perfect for combining exports and preparing unified datasets, no install.

Split large CSV files into smaller chunks by row count for uploads, imports, and batch workflows - runs in browser, no data sent.

CSV to Excel converter builds a real .xlsx workbook from pasted or uploaded CSV, with typed numbers, real dates and a bold header row. Free, no upload and no signup.

Convert CSV data to a clean HTML table with Bootstrap-compatible classes. Supports bordered, striped, and responsive options. Copy or download instantly.

Convert CSV to JSON and JSON to CSV with customizable options. Supports custom delimiters, headers, and nested output. Free, browser-based, no signup required.

Convert CSV to Markdown tables instantly with file upload support and custom delimiters. Runs in your browser - no data sent to any server.

Convert CSV files to SQL INSERT or UPDATE statements. Customize table names, column types, and database dialects including MySQL, PostgreSQL, and SQLite.

Convert CSV files to TSV (tab-separated values) or reverse. Handles quoted fields, embedded commas, and special characters correctly. Free, runs in your browser.

Transform CSV data into properly structured XML documents. Customize root elements, row tags, and indentation for clean XML output.

Convert CSV data to YAML format instantly in your browser. Handles quoted fields, custom delimiters, header rows, and automatic type detection for numbers and booleans. Free, private, no upload required.

CSV viewer online: open a CSV from a URL, upload a file, or paste data, then search, sort, and filter it in a clean table. Shareable ?url= links, custom delimiters, large files.

Build cURL commands with method, headers, query params, auth, and body. Generate copy-ready shell requests for APIs and debugging.

Convert curl commands to JavaScript fetch, Axios, or Python requests code instantly. Paste your curl command and get clean, ready-to-run code.

Convert currencies instantly with live exchange rates. Supports 150+ global currency pairs including USD, EUR, GBP, JPY, and emerging market currencies.

Generate cursive, script, fraktur, and double-struck text using Unicode. Copy and paste fancy cursive text anywhere - social media, bios, messages, and more.

CVSS calculator with the official v3.1 base and temporal equations. Score a vulnerability or paste a vector string from NVD to decode it. Shows impact and exploitability subscores.

Cyclomatic complexity calculator scores every JavaScript and TypeScript function's decision-point complexity in your browser. Spot risky code before review. Free, no signup.

Convert data storage between bits, bytes, KB, MB, GB, TB, PB, and EB. Supports binary (1024) and decimal (1000) standards.

Calculate the duration between two dates or add/subtract time periods from a date. Count workdays, weekends, and total days.

Calculate how many days are left until any future date or how many days have passed since a past date. Includes week and month approximations.

Convert decimal numbers (base-10) to binary numbers (base-2) instantly. Supports zero-padding for 4/8/16/32-bit widths, batch conversion, and large numbers.

Roll virtual dice online for free. Choose from d4, d6, d8, d10, d12, and d20 dice. Roll multiple dice at once with animated results and roll history.

Compare two texts and find differences with side-by-side and unified views. Highlight changes at word or character level with clean, intuitive interface.

Generate shareable digital business cards in .vcf format. Add contact details and download a vCard file users can import directly into phone contacts.

Build Discord embed JSON for webhooks with a live preview of colors, fields, thumbnails, and footers. Free browser-based Discord embed generator, no signup needed.

Discord timestamp generator builds every <t:epoch:style> tag at once, with a live relative preview, so each member sees the time in their own zone. Free, no login.

Calculate sale prices, find discount percentages, determine original prices, and compute stacked/double discounts. Essential for shopping and retail.

Check DKIM TXT records by selector and domain to verify email signing configuration and public key tags - no signup required.

Check and parse the DMARC DNS TXT record for any domain to verify email authentication policy, alignment settings, and reporting addresses.

Create DMARC TXT records with rua/ruf reports, alignment modes, pct rollout, and reject or quarantine policies - free, browser-based.

Look up DNS records for any domain. Query A, AAAA, CNAME, MX, NS, TXT, and SOA records instantly using Google Public DNS. Essential for domain troubleshooting.

Check DNS propagation across global resolvers for A, AAAA, CNAME, MX, NS, and TXT records to confirm your DNS changes have spread.

Query DNSKEY records for any domain and inspect DNSSEC public key metadata including flags, protocol, and algorithm - runs in your browser.

Generate docker-compose.yml files with multiple services, ports, environment variables, volumes, and named networks. Supports build contexts, depends_on, and restart policies.

Docker Compose to Kubernetes converter turns docker-compose.yml into Deployment, Service, ConfigMap and PVC manifests you can kubectl apply. Free, runs in your browser.

Build docker run commands with port mappings, volume mounts, environment variables, restart policies, and resource limits. Generates multi-line shell commands ready to copy. Free, browser-based.

Docker run to compose converter turns any docker run command into a ready docker-compose.yml file, parsing ports, volumes, env vars and flags. Free, no signup.

Generate a production-ready Dockerfile for Node.js, Python, Go, Rust, Java, PHP, and more. Supports multi-stage builds, non-root users, HEALTHCHECK, and environment variables.

Dockerfile linter checks your Dockerfile for best-practice violations and security issues with line-level findings, a score out of 10, and fix hints. Free, browser-based.

Generate a clean .dockerignore file for Node.js, Python, Java, Go, Rust, Next.js, React, and more. Exclude build output, logs, env files, and editor clutter.

Dog age calculator converts dog years to human years using both the AVMA rule of thumb and the 2020 epigenetic formula, with life stage by breed size. Free, no signup.

Check a domain's registration date, estimated age, registrar, expiration timeline, and nameserver details with a quick RDAP lookup.

Validate your .env file for naming convention errors, duplicate keys, invalid values, and formatting issues. Get line-by-line feedback instantly. Free, browser-based.

Estimate how long it takes to download a file based on your internet speed. Enter file size (MB/GB/TB) and connection speed (Mbps/Gbps) to get instant download time estimates.

Generate a clean .editorconfig file for JavaScript, TypeScript, Python, Go, Java, PHP, Markdown, YAML, JSON, and more. Standardize indentation, line endings, and whitespace rules.

Calculate how much an appliance costs to run per day, month, and year. Enter wattage, usage hours, and electricity rate to estimate your power bill. Includes common appliance wattages.

Extract all valid email addresses from text, HTML, CSV, or documents. Remove duplicates and download results as TXT or CSV - free.

Parse raw email headers to trace routing path, verify SPF and DKIM authentication, detect delays, and debug email delivery issues.

Create professional email signatures with name, role, contact details, social links, and copy-ready HTML - no account needed.

Validate email addresses instantly with format checking, domain verification, and common typo detection. Check single or bulk emails for deliverability.

Search, browse, and copy emojis instantly. Browse by category, search by name, view recently used, and copy to clipboard with one click.

Emoji translator turns English text into emoji and decodes emoji back into plain words using a 301 entry dictionary. Runs in your browser, free, no signup.

Energy converter for Joules, calories, kilowatt-hours, BTU, and more. Instant results for physics or nutrition - free, browser-based, no signup.

Compare two .env files and see added, removed, and changed variables instantly. Understands comments, quotes, and export prefixes. Free, private tool.

Convert .env files to Kubernetes Secret YAML manifests with base64-encoded values. Paste your environment variables and get a ready-to-apply Secret spec instantly. Free.

Generate ESLint configuration for any JavaScript or TypeScript project. Supports ESLint 9 flat config, legacy .eslintrc, React, Next.js, Vue 3, and common rule sets.

Ethereum unit converter turns wei, gwei, finney and ether into every other unit with exact BigInt math, plus a gas fee calculator for gwei to ETH and USD. Free, no signup.

Build Excel and Google Sheets formulas by picking a task and filling in your ranges. VLOOKUP, SUMIFS, DATEDIF, TEXTJOIN, FILTER and more, each with a plain-English explanation.

Excel to CSV converter turns any .xlsx or .xlsm worksheet into clean CSV, with sheet picking, custom delimiters and ISO dates. Free, private and runs in your browser.

Excel to JSON converter turns any .xlsx or .csv worksheet into clean JSON records, with header keys, ISO dates and multi sheet support. Free, private, runs in your browser.

View, edit, and remove hidden metadata in your photos (Exif data). Modify camera settings, location, and date information online.

Remove GPS location, camera model, timestamps, and all EXIF metadata from photos instantly in your browser. Batch process images and download clean files - nothing is uploaded to any server.

Postgres EXPLAIN ANALYZE visualizer shows a color-coded plan tree with per-node self time, row estimate misses, disk spills, and slow sequential scans. Free, no signup.

Calculate exponential backoff retry schedules for API calls. Set base delay, multiplier, and max cap to see per-attempt delays with full, equal, or no jitter. Free online tool.

Generate realistic fake data for testing and development. Create random names, emails, phone numbers, addresses, and more in JSON or CSV format.

Generate stylish Unicode text fonts for Instagram bios, Twitter posts, and social media. 18 styles including bold, italic, cursive, gothic, circled, and more.

Generate FAQPage JSON-LD schema markup from your questions and answers to improve structured data coverage and rich result eligibility.

Calculate your daily electrolyte targets during intermittent or extended fasting. Personalized for body weight, activity level, keto status, and sweat rate. Includes a morning/midday/evening dosing schedule.

Plans your personalized 5-day Fasting Mimicking Diet cycle based on Dr. Valter Longo's protocol. Calculates calorie and macro targets for each day adjusted for your body weight and goal.

Scan a website for favicon, apple-touch-icon, and manifest icon coverage. Validate icon URLs, status codes, and recommended sizes.

Generate favicons from text, emoji, or initials with custom colors and sizes. Download as ICO, PNG, or SVG for your website.

FFmpeg command generator with 36 ready recipes - compress, trim, convert, extract audio, resize, GIF, subtitles, HLS. Every flag explained. Free, runs in your browser.

File size converter for bytes, KB, MB, GB, TB, and PB. Supports both binary (1024) and decimal (1000) standards - free and runs in your browser.

Find and replace text with support for regex, case-sensitive matching, whole word search, and multi-line replacement. Preview changes before applying.

Calculate your FIRE number - the investment portfolio size needed to retire early. Uses the 4% safe withdrawal rule. Shows years to FIRE, Coast FIRE number, Lean/Fat FIRE variants, and year-by-year savings projections.

Flip a virtual coin online with true 50/50 probability. Track flip history, see heads vs tails statistics, and make quick random decisions. Free coin toss simulator.

Calculate fractions online: add, subtract, multiply, and divide fractions or mixed numbers. Shows step-by-step solution with simplified results and decimal equivalent.

Calculate fuel cost for any trip based on distance, vehicle MPG or L/100km, and gas price. Estimate road trip gas expenses with US and metric unit support.

Generation calculator finds which generation a birth year falls in, from Baby Boomer to Gen Z and Gen Alpha, with the source for every date range. Free, no signup.

Geohash converter that encodes latitude and longitude into a geohash and decodes any geohash back to coordinates, a bounding box and neighbors.

Git command generator with 44 task recipes: undo the last commit, squash with rebase, force push safely, recover a deleted branch. Every flag explained, risky commands flagged.

Generate GitHub Actions CI/CD workflow YAML for Node.js, Python, Go, Java, and Rust. Supports tests, lint, Docker builds, and multi-branch triggers. Free online.

Generate a professional GitHub README.md file in seconds. Auto-fetch project details from any public GitHub repository, add badges, features, installation steps, and license - no boilerplate needed.

Fetch GitHub repository metrics like stars, forks, open issues, and size using the public GitHub API. Quickly audit any repo without leaving your browser.

Fetch public GitHub profile metrics including followers, repos, and gists via the GitHub API - instant results, no login required.

GitLab CI generator for Node, Python, Go, Java, PHP, Ruby and Rust. Builds a .gitlab-ci.yml with lockfile caching, needs: DAG, JUnit reports and a manual production gate.

Calculate your Glucose Ketone Index (GKI) from blood glucose and ketone readings. See your metabolic zone on the Seyfried scale and get goal-aligned guidance for weight loss, longevity, or therapeutic ketosis.

Glob to regex converter that turns wildcard patterns like src/**/*.ts into anchored JavaScript regex. Supports globstar, braces and classes.

Project your weight loss timeline on GLP-1 medications (Ozempic, Wegovy, Mounjaro, Zepbound) using averages from published clinical trials. See projected weight at 12, 24, and 52 weeks.

Preview 100+ Google Fonts live in your browser. Adjust size, weight, style, and letter spacing, then copy the ready-to-use HTML link tag and CSS code.

Calculate your semester and cumulative GPA instantly. Supports 4.0 scale, 10.0 CGPA scale, and percentage systems. Add courses, grades, and credits for accurate results.

Format GraphQL queries, mutations, subscriptions, and fragments or minify GraphQL documents for compact API and frontend code usage.

GraphQL to TypeScript converter turns GraphQL SDL types, enums, interfaces, and unions into ready-to-use TS interfaces. Free, instant, browser-based.

Calculate GST amounts instantly. Add GST to base price or remove GST from inclusive price. Supports all GST rates with CGST and SGST breakdown.

Gzip-compress text to Base64 or decompress Base64 gzip data back to text in your browser. Shows the compression ratio and downloads as .gz. Free, private, powered by CompressionStream.

Generate stylish handwritten signature designs from your name. Customize script style, color, size, and download as SVG or PNG.

HAR file analyzer parses Chrome and Firefox DevTools exports into a readable performance report with request timing, sizes, and failures. Free, browser-based, no upload.

HAR to cURL converter turns a Chrome or Firefox DevTools HAR export into copy-ready curl commands for every captured request. Free, browser-based, private.

Generate secure hashes with MD5, SHA-1, SHA-256, and SHA-512 algorithms. Essential for data integrity verification and security applications.

Hash identifier that works out which algorithm produced an unknown hash. Detects MD5, SHA-256, bcrypt, Argon2, NTLM, MySQL and 40 more formats in your browser.

Generate trending hashtags for Instagram, TikTok, Twitter/X, LinkedIn, and YouTube. Enter a keyword and get optimized hashtags for maximum reach and engagement.

Calculate your 5 heart rate training zones using Fox, Tanaka, or Karvonen methods. Find your fat burning zone, aerobic zone, and max heart rate for optimized cardio workouts.

Make heart text art in 8 styles - ASCII hearts, emoji art, rose art and love messages. One click to copy, then paste anywhere. Free, no signup required.

Convert Apple HEIC and HEIF photos to JPG, PNG, or WebP format directly in your browser. Batch convert iPhone photos with adjustable quality. No upload to any server - 100% private.

Helm chart generator scaffolds Chart.yaml, values.yaml and templates for Deployment, Service, Ingress and autoscaling, validated and downloadable as a ZIP. Free, no signup.

Convert hexadecimal numbers (base-16) to binary numbers (base-2) instantly. Each hex digit maps to exactly 4 binary digits. Supports batch conversion and nibble grouping.

Convert hexadecimal to decimal and decimal to hex instantly. Supports large numbers, batch conversion, and shows binary & octal formats. Free browser-based tool.

Hex to text converter decodes hexadecimal bytes into readable ASCII or UTF-8 text and converts text back to hex with 0x, \x, comma or space formats. Free and instant.

Hex viewer online: open any binary file and read it as a hex dump with offsets and an ASCII column. Detects the file type from magic bytes, searches text or hex patterns, jumps to any offset.

Generate HMAC signatures using SHA-256, SHA-512, MD5, and more, then export as hex, Base64, or Base64URL - fully browser-based.

Calculate the number of hours and minutes between two times. Perfect for payroll, work hours, shift duration, and time tracking. Supports 12-hour and 24-hour formats with optional break deduction.

Create hreflang and x-default link tags for multilingual websites so search engines serve the correct language and region page.

Generate Strict-Transport-Security (HSTS) headers with includeSubDomains and preload directives. Enforce HTTPS for your domain easily.

htaccess redirect generator creates rewrite rules for 301 redirects, HTTPS enforcement, and WWW canonicalization. Copy ready-to-use Apache config instantly.

Htaccess to nginx converter turns Apache rewrite rules, redirects, headers and expires directives into working nginx config, flagging whatever needs a manual review.

HTML accessibility checker that scans pasted markup for WCAG 2.2 failures: missing alt text, unlabeled form fields, skipped headings, and broken ARIA. Free, no signup.

HTML cleaner strips inline styles, classes, empty tags, comments and Word or Google Docs junk from pasted HTML, then pretty prints clean, readable markup. Free, in your browser.

Free online tool to encode or decode HTML entities. Fast, private, and easy to use with no login required. All processing happens in your browser.

Encode and decode HTML entities instantly in your browser. Converts &lt;, &gt;, &amp;, &quot;, and 20+ named entities. Supports numeric encoding for Unicode characters. Free, no signup.

Format and beautify HTML code with proper indentation and structure. Clean up messy HTML, fix nesting, and make your markup readable instantly.

HTML playground with live preview and shareable links. Write HTML, CSS, and JavaScript, watch it auto-run, and share the code in a URL - no login, no setup, nothing stored.

Minify HTML code by removing comments, whitespace, and unnecessary characters. Reduce HTML file size for faster page loading.

Browse and copy all HTML entities - symbols, punctuation, math, arrows, and currency - as entity name, decimal code, or hex code.

Create HTML tables visually with a click-to-edit interface. Add rows, columns, style with borders, and export as HTML or Markdown.

HTML table to JSON converter extracts any HTML table into structured JSON or CSV, using header rows as keys. Paste markup and export instantly. Free, no signup.

Convert HTML to valid JSX and JSX back to HTML. Handles className, style objects, self-closing tags, event handlers, and comments automatically.

HTML to Markdown converter - cleanly transforms headings, tables, code blocks, and images. Runs in the browser, no data sent to servers.

Convert HTML code with CSS styling to PDF documents. Generate professional PDFs from HTML with tables, images, and custom layouts. Free browser-based converter.

Convert HTML to clean plain text by stripping all tags. Handles entities, removes scripts and styles, with options to preserve links, line breaks, and image alt text.

Generate Apache and Nginx .htpasswd entries for HTTP basic auth online. Batch generate SHA-1 hashed passwords instantly. All hashing runs in-browser - passwords never leave your device.

Generate HTTP Cache-Control headers with max-age, s-maxage, stale-while-revalidate, immutable, and more. CDN and browser caching strategies included. Free, browser-based.

Build Set-Cookie HTTP headers with all attributes - HttpOnly, Secure, SameSite, Path, Domain, Max-Age. Generate cookie headers for web development instantly. Free, no signup.

Parse raw HTTP request or response headers into a readable table, JSON structure, and quick audit view for security, caching, and CORS.

HTTP request to cURL converter turns a raw request from devtools, a proxy, or an .http file into a runnable curl command with correct shell quoting. Free, in your browser.

Inspect all HTTP response headers of any website. Audits security headers like HSTS, CSP, and X-Frame-Options and groups headers by type.

Check HTTP status codes, response headers, and redirect chains for any URL. Identify 301/302 redirects, 404 errors, and server response times instantly. Free, no signup required.

Look up any HTTP status code and its meaning instantly, from 200 OK and 404 Not Found to 500 Server Error. Browse or search the list free, no signup required.

Test if any website supports HTTP/2 and HTTP/3 (QUIC) via real TLS ALPN negotiation. Shows TLS version, server headers, alt-svc advertisement, and response time.

Validate IBAN numbers instantly with country-specific length checks, formatting, and MOD-97 checksum verification for international bank accounts.

Convert PNG, JPEG, or WebP images to Windows ICO format. Create multi-size icons (16x16 to 256x256) for favicons and applications. Free, browser-based.

Calculate your ideal body weight using four medical formulas - Hamwi, Devine, Robinson, and Miller. Enter your height and gender to see a recommended healthy weight range.

Convert decimal numbers to IEEE 754 binary and hex, or decode raw bits back into a float instantly. Supports 32-bit single and 64-bit double precision formats.

Image color extractor pulls dominant colors from any image and builds a palette. Get HEX, RGB, and HSL values instantly - no upload to server required.

Compress images online while maintaining quality. Supports HEIC, JPEG, PNG, WebP, BMP, GIF, TIFF formats. Features aspect ratio maintenance, custom dimensions, quality presets, batch processing with ZIP download. Reduce file sizes for faster web loading.

Crop images with precision using interactive selection. Supports aspect ratio presets, rotate, flip, and export to JPEG, PNG, or WebP formats.

Compare two images pixel by pixel and instantly highlight every visual difference with a diff overlay. Great for visual regression testing, free and browser-based.

Resize images to specific dimensions or percentage online. Maintain aspect ratio and download in high quality. Free, browser-based, no upload required.

Rotate and flip images online for free. Rotate 90, 180, 270 degrees, flip horizontally or vertically, or use a custom angle. Download results instantly.

Convert any image or photo into ASCII art text. Adjust width, contrast, and character sets. Download or copy the generated ASCII art instantly.

Convert images to Base64 strings instantly. Supports JPEG, PNG, GIF, WebP, SVG, and BMP. Copy CSS background or HTML image tag code easily.

Convert images to PDF online for free. Combine multiple JPG, PNG, WebP images into a single PDF with custom page size, orientation, and margins. 100% browser-based.

Extract text from images using OCR (Optical Character Recognition). Upload screenshots, photos, or scanned documents and get editable text instantly. Supports 18+ languages.

Add a text watermark to images with custom opacity, size, rotation, placement, and export format. Works locally in your browser for private image processing.

Calculate your dietary inflammation score across 14 food groups using the Dietary Inflammatory Index (DII). See your top pro-inflammatory drivers and get personalised food swap recommendations.

Calculate how inflation has changed the purchasing power of money over time. Enter any amount and see its equivalent value in any year from 1960 to today using US CPI data.

Convert INI and CFG config files to JSON format in your browser. Supports sections, key-value pairs, comments, and multi-line values. Free, no signup.

Calculate your HOMA-IR score to assess insulin resistance using fasting blood glucose and insulin values. Includes QUICKI index, five-tier interpretation, and personalised diet and lifestyle recommendations.

Calculate your eating and fasting windows for any intermittent fasting protocol. Supports 16:8, 18:6, 20:4, OMAD, 5:2, and more. See exact eating window times and metabolic stages reached.

Test your internet speed online. Measure download speed, upload speed, ping, and jitter instantly in your browser using Cloudflare's servers.

Invisible character remover strips zero width spaces, BOMs, bidi overrides, and hidden tag characters, and names every codepoint it finds. Free and private.

Create professional invoices online and download as PDF. Add your business details, client info, line items, tax, and discounts. Free invoice generator with no sign-up required.

Look up geolocation, ISP, timezone, and other information for any IP address. Find your public IP and trace IP locations instantly.

Check if an IP address is listed on 15+ major DNSBL spam blacklists including Spamhaus, SpamCop, and Barracuda. Instantly audit email server reputation and identify deliverability issues.

Instantly look up the geographic location, ISP, timezone, and network details for any IP address. Enter an IP or detect your own public IP with one click.

IP range to CIDR converter that turns a start and end address into the smallest exact set of CIDR blocks. Merges overlapping ranges, handles IPv4 and IPv6. Free, no signup.

IPv6 address expander converts shorthand IPv6 to the full 8-group form and compresses it back to RFC 5952 canonical notation. Keeps CIDR, zone IDs and embedded IPv4.

Check ISBN-10 and ISBN-13 codes to fetch book metadata including title, publisher, publication date, and page count - free, no signup.

ISO 8601 duration converter turns PT1H30M or P3DT4H5M6S into readable time, clock format and total seconds, and converts any number of seconds back into a valid duration.

Format and beautify JavaScript code instantly with customizable indentation, brace style, and line length settings. Works with ES6+, JSX, and modern JS syntax. Free and private.

JavaScript deobfuscator decodes hex escapes, String.fromCharCode, base64 payloads and string-array lookups, then re-indents the code. Every change is syntax checked in the browser.

Minify JavaScript code by removing comments, whitespace, console.log statements, and debug code. Optimize JS for production.

Obfuscate JavaScript code to make it harder to read and reverse-engineer. Remove comments, encode strings to unicode escapes, compact whitespace, and optionally wrap with eval/base64 encoding.

JavaScript playground runs your JS code instantly in a sandboxed browser tab with live console output, top-level await, timing and error traces. Free, no signup, nothing uploaded.

Validate JavaScript syntax instantly in your browser with a real parser. Catch syntax errors with exact line and column numbers, check module or script code, and see statement stats. Free, no signup.

Jenkinsfile generator builds a declarative Jenkins pipeline with agents, stages, triggers, environment variables and post actions. Copy or download, free, no signup.

Convert JPG and JPEG images to raw uncompressed pixel data in your browser. Export RGBA, RGB, grayscale, or BGRA byte streams as headerless .raw files. Batch convert multiple JPGs, free and private.

Convert JPG, PNG, and other images to WebP format for faster web performance. Batch convert with adjustable quality. 100% browser-based, no upload needed.

Convert JavaScript objects and literals to valid JSON format with proper quoting, escaping, and formatting. Handles ES6 shorthand, methods, and complex nested objects. Free browser tool.

Compare two JSON objects and find all differences. Detect added, removed, and changed properties with full path details and color-coded results.

Escape and unescape JSON strings online. Convert special characters like quotes, backslashes, newlines, and tabs to their JSON-safe equivalents instantly.

Flatten nested JSON objects into dot-notation keys instantly. Great for logs, spreadsheets, API payload inspection, and analytics workflows.

Format, validate, and beautify JSON data with instant results and error highlighting. Supports nested objects and arrays. Free, browser-based, no signup required.

JSON merge combines two JSON objects with deep merging and configurable conflict handling for arrays and duplicate keys. Free, browser-based, no signup.

Minify and compress JSON data by removing whitespace, comments, and unnecessary characters. Reduce JSON file size for APIs and production use.

Parse, validate, and format JSON strings with detailed error reporting and line number highlighting. Instantly detect syntax errors in malformed JSON. Free online tool, no signup needed.