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Basic Auth Header Generator
Build an HTTP Basic Authorization header from transient username and password fields. Processed in your browser.
Basic Auth is reversible encoding. Use the generated header only over HTTPS. Credentials stay in this page until cleared or you leave.
Your result appears here
Run the tool to inspect the output. Input stays on this device.
How to use Basic Auth Header Generator
- Enter the username and password.
- Run the tool and review its result or validation message.
- Download the complete result, or copy text output. Clear removes the result and releases its download.
Does this upload my data?
No. This tool runs in a browser worker. Input is not stored or sent to a server.
Does Base64 change a file format?
No. Encoding and decoding preserve bytes. A format-specific tool checks the signature, but does not transcode or guarantee that a file is intact. Some media may not play in your browser; the download still preserves the bytes. SVG and HTML are never rendered here.