HTTP Header Parser

Tidy raw HTTP headers, export them as JSON and check common security headers.

• Runs locally in your browser — no upload, no account

How to use HTTP Header Parser

1. Type or paste your text, or open a file.
2. Choose the options you want.
3. Copy or download the result.

Frequently asked questions

Is HTTP Header Parser free?

Yes. HTTP Header Parser is free to use and needs no account or sign-up.

Is my data sent anywhere?

No. Everything you enter is processed inside your browser and is not sent to a server.

Does it work offline?

Once the page has loaded, processing needs no internet connection.

Does it work on phones?

Yes. It works in current mobile browsers on Android and iPhone, as well as on desktop.

Related tools

• URL & Query String Parser — Break a URL into its parts and edit query parameters. Includes a UTM builder.
• User-Agent Info — See your browser’s user agent and client hints, or parse any user-agent string.
• JWT Decoder — Decode the header and payload of a JSON Web Token and show its expiry.
• JSON Formatter & Validator — Format, validate and minify JSON, with the exact position of syntax errors.
• Base64 Encoder / Decoder — Encode text to Base64 or decode it back. UTF-8 safe, including Hindi.
• URL Encoder / Decoder — Percent-encode or decode text for use in URLs.