HTTP security headers scanner

Paste HTTP headers and find missing security headers such as HSTS, CSP, and X-Frame-Options.

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Overview

Quick check for HTTP response hardening in web apps and APIs.

Technical deep dive

Common questions summarized

  • What is this tool for?: It runs fully in your browser: useful to validate, format, or convert data in everyday development.
  • Are my inputs sent to a server?: Processing happens locally with JavaScript. We do not store what you paste into the text areas.
  • Can I use this for real production data?: Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.

Sample payload to try

  • See also the larger "Code Snippets" sample; paste this excerpt to try locally: Example — Strict-Transport-Security: max-age=31536000 X-Frame-Options: SAMEORIGIN

Tool guide

  • What security headers are HTTP response headers that reduce risks such as clickjacking, MIME sniffing, and transport downgrade.

  • What the tool manipulates A pasted block of raw HTTP headers from browser/devtools/proxy/API client.

  • What the tool does Checks presence and baseline quality of headers such as HSTS, CSP, X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.

  • Why use it Quick hardening review for web apps/APIs and pre-release security checklists.

Code Snippets

Code example
Strict-Transport-Security: max-age=31536000
X-Frame-Options: SAMEORIGIN

Example

Strict-Transport-Security: max-age=31536000
X-Frame-Options: SAMEORIGIN

FAQ

What is this tool for?

It runs fully in your browser: useful to validate, format, or convert data in everyday development.

Are my inputs sent to a server?

Processing happens locally with JavaScript. We do not store what you paste into the text areas.

Can I use this for real production data?

Use at your own risk. For secrets (passwords, tokens), prefer controlled environments and your company policies. And always review the generated contents. Never trust blindly things you see on the internet.