Ed25519 Key Generator | SSH Key Pair Online

Generate an Ed25519 SSH key pair online in OpenSSH format, ready for GitHub, GitLab or authorized_keys, with its SHA256 fingerprint. Nothing is uploaded. Designed specifically for developers and professionals, this free online generator runs entirely in your browser to process tasks quickly and securely. Enjoy unlimited usage with no data tracking and no registration required.

Also known as: ed25519 key generator · ed25519 key generator online · ssh ed25519 key generator · ed25519 key pair generator · generate ed25519 ssh key · ssh-keygen ed25519 online · ed25519 public key generator · openssh private key generator

password and key generators

ssl and security tools

encryption tools

generators

Key Settings

Comment (usually your email)

File name

Fingerprint

Appears after generation

Private Key Output

Public Key Output

Install it locally

mv ~/Downloads/id_ed25519 ~/Downloads/id_ed25519.pub ~/.ssh/
chmod 600 ~/.ssh/id_ed25519
ssh-keygen -p -f ~/.ssh/id_ed25519   # add a passphrase
ssh-add ~/.ssh/id_ed25519
ssh -T git@github.com

Step-by-step for Mac, Windows and Linux: how to generate an SSH key for GitHub.

About the Ed25519 Key Generator

This tool creates an Ed25519 SSH key pair for GitHub, GitLab, Bitbucket or a server's authorized_keys file when you cannot run ssh-keygen, such as on a locked-down work laptop or a Chromebook. The private key is written in the same OpenSSH format ssh-keygen uses, and the math runs in your browser tab, so no key material is uploaded or stored.

Key Features

Generates the ssh-ed25519 key type GitHub recommends and OpenSSH uses by default since version 9.5
Private key in OpenSSH format (BEGIN OPENSSH PRIVATE KEY), accepted by ssh, ssh-add and ssh-keygen
One-line public key with your comment, ready for GitHub, GitLab or authorized_keys
SHA256 fingerprint that matches ssh-keygen -l, so you can confirm the key on GitHub's settings page
Download buttons save id_ed25519 and id_ed25519.pub under the file name you choose
Nothing is saved: private keys are never written to browser storage

Use Cases

Add an SSH key to GitHub from a corporate Windows laptop where installing Git for Windows needs IT approval
Create a deploy key for one repository, such as a Vercel or AWS CodeBuild pipeline in us-east-1
Give a contractor a key pair for a staging server without sharing your personal key
Generate a separate work key so your company GitHub account and personal account do not collide
Teach SSH key basics in a bootcamp or classroom without installing anything

Supported Formats

OpenSSH private key (openssh-key-v1)

OpenSSH public key (ssh-ed25519)

SHA256 fingerprint

Related Keywords

ed25519 key generator

ed25519 key generator online

ssh ed25519 key generator

ed25519 key pair generator

generate ed25519 ssh key

ssh-keygen ed25519 online

ed25519 public key generator

openssh private key generator

Is Ed25519 better than RSA for SSH keys?

For new keys, yes. An Ed25519 public key is 68 characters of base64 against more than 700 for RSA 4096, signing is faster, and the algorithm has no weak-parameter choices to get wrong. GitHub's documentation recommends Ed25519 and suggests RSA 4096 only for legacy systems that cannot use it. Keys from this page have no passphrase, so add one locally with ssh-keygen -p before you use the key.

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

Liked this tool?

DevToolLab is free to use. If this generator saved you some time today, please consider supporting our work.

Buy us a coffee ☕

Frequently asked questions

What is Ed25519 Key Generator used for?

Generate an Ed25519 SSH key pair online in OpenSSH format, ready for GitHub, GitLab or authorized_keys, with its SHA256 fingerprint. Nothing is uploaded.

Is Ed25519 Key Generator free to use?

Yes. Ed25519 Key Generator is completely free with no usage limits, and there is no paid tier required to use it.

Do I need an account to use Ed25519 Key Generator?

No. Ed25519 Key Generator works immediately in your browser with no signup, login, or email address required.

Related Tools

UUID Generator Online | Unique Identifier Generator

Generate universally unique identifiers (UUIDs) in multiple versions and formats. Perfect for database keys, API identifiers, and unique resource naming.

sql and database tools

encryption tools

Color Picker & Palette Generator | HEX RGB HSL Color Tool

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

color tools

random generators

Password Generator Online | Secure Random Passwords

Generate strong, secure passwords with customizable length and character sets. Cryptographically secure random generation for maximum security.

html tools

text tools

Text to Handwriting Generator | Converter

Text to handwriting generator turns typed text into realistic handwritten notes. Choose 10 fonts, lined or grid paper and ink colors, then export PNG or PDF.

text tools

color tools

More Tools You Might Like

Pastebin Online | Share Code & Text Snippets Free

Popular

Share code snippets, logs, and text with a shareable link. Syntax highlighting for 30+ languages, expiration controls, and password protection for Pro users.

text tools

password and key generators

math calculators

utilities

Use Tool

URL Tracker & Link Shortener | Track Clicks

Popular

Create short, trackable URLs with detailed click analytics. Track visitor location, devices, referrers, and more. Password protection & QR codes included.

text tools

password and key generators

url and link tools

networking

Use Tool

Webhook Receiver & Inspector | Test HTTP Webhooks

Popular

Generate a unique URL to easily test, receive and inspect HTTP webhooks in real-time. View request headers, query parameters, JSON payloads, and more.