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Basic Auth Header Generator and Decoder

For developers and API testers working with endpoints that use HTTP Basic authentication. You get a ready Authorization header, and you can decode a captured header to check which credentials it carries.

FreeRuns in your browserNothing uploadedNo sign-up neededAll 15 tools in the Security Toolbox
Keep this resultSign in to email it to yourself or save it to your profile. The tool itself never needs an account.

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How to use

How to use the Basic Auth Header Generator

  1. Enter the Username and Password.
  2. Read the generated Authorization: Basic header, which updates as you type, and click Copy.
  3. To inspect an existing header, paste it into Decode a header.
  4. Read the decoded user and password below it.
Worked example

An example, step by step

You enter

Username admin, password hunter2

The tool shows

Authorization: Basic YWRtaW46aHVudGVyMg==

FAQ

Questions about the Basic Auth Header Generator

Is HTTP Basic authentication encrypted?

No. The header is only Base64 of username:password, which anyone can decode, as this tool shows. Always send Basic auth over HTTPS and prefer tokens where you can.

How is a Basic auth header built?

Join the username and password with a colon, Base64-encode the result, and prefix it with Basic. The header line is Authorization: Basic followed by that string.

Why should captured Basic auth headers be treated as passwords?

Because decoding gives back the plain credentials. If one appears in a log or proxy capture during a review, report it and rotate the password.

Is the Basic Auth Header Generator free and private?

Yes. It is free, needs no sign-up and runs entirely in your browser, so what you type is not uploaded. You only sign in if you want to email a result to yourself or save it to your CareerByteCode profile.

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