Base64 Basic Auth Decoder

HTTP Basic Authentication sends username:password encoded with Base64 inside an Authorization: Basic ... header. This tool decodes that credential string so you can inspect test headers and debug integrations.

1. Paste either the whole Basic ... header value or only the Base64 credentials.
2. Review the username and password fields.
3. Rotate the credentials if you accidentally paste production secrets into an unsafe place.

Input: Basic dXNlcjpwYXNz

Output: username user, password pass

• Basic Auth is not secure by itself. It must be sent over HTTPS.
• Base64 is reversible, so do not log Basic Auth headers in production.
• If the decoded value has no colon, it is not a standard Basic Auth credential pair.

• Decode raw strings with Base64 to text.
• Validate copied values with the Base64 validator.
• Encode test credentials with Text to Base64.

Decoding runs locally, but credentials are still sensitive. Clear the input after inspection.