Basic Auth Header Generator
Generate an HTTP Basic Authorization header from a username and password, or decode a header locally.
First line is username; all remaining text is the password. Encoding uses UTF-8. Basic authentication requires HTTPS and does not encrypt credentials.
Enter or paste your input
The example is ready to edit. Your input stays in this browser.
Choose your settings
Change the direction or options only if you need to.
Processed locally in your browser. Avoid sharing the result if it contains private data.
How to use Basic Auth Header Generator
- Paste your input or load the included example.
- Choose the conversion direction and check the expected format.
- Select Generate header, then inspect the result or any validation message.
- Copy or download the output for your workflow.
Format and limitations
First line is username; all remaining text is the password. Encoding uses UTF-8. Basic authentication requires HTTPS and does not encrypt credentials.
Example input
demo example-password
Practical guides
- HTTP Basic Authentication: Header Format and Limitations — Generate and decode Basic Authorization headers and understand usernames, passwords, UTF-8, and HTTPS.
- How to Send Basic Auth with JavaScript fetch() — Construct a Basic Authorization header for fetch and troubleshoot Unicode encoding, CORS, and exposed credentials.
Does this tool upload my input?
The transformation runs in your browser. This tool does not send input to a conversion API. Browser memory limits still apply; split very large inputs into manageable batches.