Basic Auth Validator
Paste an HTTP Basic auth header to check whether it is valid — complete with the reason if it is invalid and a component breakdown if it is valid. Everything is processed on your device.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
Basic dXNlcjpwYXNz
Example Output
✓ VALID — username "user"
How to Use
- 1Paste the an HTTP Basic auth header you want to check into the input box.
- 2If the tool offers extra options (e.g. dialect, flags, or variant), set them as needed.
- 3Click Validate (or press Ctrl+Enter).
- 4Read the result badge — VALID, INVALID, or VALID with a warning — along with the details and the list of issues, if any.
About Basic Auth Validator
Basic Auth Validator checks an Authorization: Basic header — the part after "Basic " must be the Base64 of "username:password". The tool decodes the token, confirms the ":" separator, then shows the username (the password is masked).
Useful for debugging an auth header without leaking the password. Everything runs in the browser.
FAQ
Is my data sent to a server?
No. All validation runs in your browser with JavaScript. Nothing is uploaded, logged, or stored on our servers — safe for sensitive data.
How is this validator different from a parser or formatter?
A validator answers one question: is this input correct/valid? It returns a valid/invalid badge with the reason. A parser breaks input into its components, and a formatter tidies its layout. Use a validator when you just need to confirm something is sound before using it.