API Authentication Header Builder
Build API authentication headers: Bearer token, Basic Auth, API Key, HMAC, AWS Signature v4.
About API Authentication Header Builder
Build API authentication headers: Bearer token, Basic Auth, API Key, HMAC, AWS Signature v4. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.
FAQ
What does this tool do?
Build API authentication headers: Bearer token, Basic Auth, API Key, HMAC, AWS Signature v4.
Is my data sent to a server?
No. This tool runs 100% in your browser. Nothing is uploaded, tracked, or stored remotely.
What extra features does this tool have?
Extras: (1) (1) Bearer token header, (2) (2) Basic Auth header, (3) (3) API Key header, (4) (4) HMAC signature header, (5) (5) AWS Signature v4, (6) (6) OAuth 2.0, (7) (7) JWT header, (8) (8) Custom headers, (9) (9) curl command generator, (10) (10) Copy header, (11) (11) Export config, (12) (12) PWA offline
Does this work offline?
Yes — install as a PWA and use it without network.
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