CSP Generator | Content Security Policy Header Builder

Build Content-Security-Policy headers and meta tags with common directives, reporting options, and quick security warnings. 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: csp generator online free · content security policy generator · csp header builder for websites · security header generator online · content security policy header tool · csp directive builder online · http security header generator tool · csp generator · csp header builder · security header generator · content security policy · content security policy header · csp directive builder · http security header tool

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Policy Settings

Choose how you want to deliver and harden the generated Content Security Policy.

Report-Only Header

Ship the policy in report-only mode while you validate violations.

Upgrade Insecure Requests

Tell the browser to rewrite HTTP subresource requests to HTTPS.

Block All Mixed Content

Reject insecure subresources that still slip through after HTTPS upgrades.

Report URI

Optional. Add a reporting endpoint if you want browsers to send CSP violation reports.

Common Directives

Fill only the directives you need. Empty fields are omitted from the final policy.

default-src

Fallback rule for everything not covered by a more specific directive.

script-src

JavaScript sources, including third-party SDKs and CDNs.

style-src

Stylesheets and inline style allowances.

img-src

Images, favicons, and CSS background assets.

connect-src

Fetch, XHR, WebSocket, EventSource, and beacon endpoints.

font-src

Font files loaded by the page.

object-src

Embedded objects and plugins. Lock this down unless required.

frame-ancestors

Controls which sites may embed this page in a frame.

base-uri

Restricts where the document base URL may point.

form-action

Allowed form submission destinations.

Delivery

Enforced Header

Directives

Flags

Warnings

Output

Switch between a response header, a meta tag, or the raw policy value.

Content-Security-Policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; connect-src 'self'; font-src 'self' data:; object-src 'none'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'; upgrade-insecure-requests

Configured Directives

default-src

script-src

style-src

img-src

connect-src

font-src

object-src

frame-ancestors

base-uri

form-action

Risk Flags

`style-src` still allows `unsafe-inline`; keep it temporary if possible.

Delivery Notes

Response headers are the preferred production delivery method because they apply before the HTML is parsed.

Replace temporary `unsafe-inline` allowances with nonces or hashes once you know which inline assets still need coverage.

Start with report-only mode if you are tightening an existing site and need to observe violations before enforcing changes.

About CSP Generator

Build a Content Security Policy header or meta tag without hand-writing every directive. This tool is useful when you are locking down scripts, styles, images, API endpoints, fonts, and framing rules for a web app.

Key Features

Generates `Content-Security-Policy` or `Content-Security-Policy-Report-Only` headers from common directives.
Exports header, meta-tag, and raw-policy views for docs, frameworks, and server configs.
Highlights broad or risky patterns such as wildcards, `unsafe-inline`, `unsafe-eval`, and missing baseline directives.

Use Cases

Create a baseline CSP for a Next.js, React, or static site deployment.
Draft a report-only policy before turning on full enforcement in production.
Document or share a policy with engineering, security, or DevOps teams.

Supported Formats

HTTP response header

HTML meta tag

Raw CSP string

Related Keywords

csp generator

content security policy generator

content-security-policy header builder

csp header generator

security header generator

Important note

Meta tags can deliver an enforced CSP, but they do not support report-only mode and they apply later than response headers. Prefer headers whenever you control the server or edge config.

Privacy & Security

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

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Frequently asked questions

What is CSP Generator used for?

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

Is CSP Generator free to use?

Yes. CSP 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 CSP Generator?

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

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