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Basic Auth Header Generator

Build or decode HTTP Authorization: Basic headers, with curl and fetch examples.

Free, no uploads, no sign-up. Runs 100% in your browser.

How Basic Auth Header Generator works

Basic Auth Header Generator runs entirely in your browser. Build or decode HTTP Authorization: Basic headers, with curl and fetch examples. Under the hood it uses Plain TypeScript (small, dependency-free code that runs instantly in your tab). Your files are read into this tab’s memory, processed on your own CPU, and handed back to you as a download. Nothing is sent to a server.

How to use Basic Auth Header Generator

1. Open Basic Auth Header Generator and paste or type your input.
2. Results update instantly as you type.
3. Tweak options such as format, indentation or algorithm.
4. Copy the output or download it as a file.

Tips

• Everything is computed locally. Safe for tokens, keys and private data.
• Use Ctrl/⌘ + K to jump between developer tools quickly.

Basic Auth Header Generator FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

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