HTTP Header Builder
Assemble an HTTP header block from Key=Value pairs. Everything is processed on your device, nothing is sent to a server.
or press Ctrl+Enter
Result
Fill the fields and click Run — the result appears here.
Everything runs in your browser. Your data is never sent to our servers.
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Example
Example Input
Accept=application/json X-Key=abc
Example Output
Accept: application/json X-Key: abc
How to Use
- 1Fill the input fields with your data (or paste the text to process).
- 2If there are options, adjust them to your needs.
- 3Click Run (or press Ctrl+Enter) to build.
- 4The result appears in the Result area. Click Copy to copy it.
About HTTP Header Builder
The HTTP Header Builder turns simple Key=Value pairs into a properly formatted HTTP header block (Name: value). Useful for assembling request headers, docs, or server config.
100% in the browser.
FAQ
Are any network requests sent?
No. This tool only transforms/analyzes text in your browser — no actual HTTP request is sent, and your data never leaves your device. (Tools that truly call an external server are intentionally not provided due to browser CORS limits.)
Is my data safe?
Yes. All processing happens entirely locally in your browser. Nothing is uploaded, logged, or stored on our servers.