HTTP Basic Auth Generator
Generate Authorization headers, curl commands and fetch snippets.
The WebURL Basic Auth Checker is a free online tool, no signup required, that verifies a URL's HTTP Basic authentication setup — use it to confirm access controls on protected pages.
About this tool
The Basic Auth tool builds or decodes HTTP Basic Authentication headers. Enter a username and password to get the complete Authorization header value, ready to paste into curl, Postman or a frontend fetch call.
The decode mode works in reverse: paste an Authorization header captured from a request and recover the plaintext username and password - useful for debugging authentication setup.
Security note: Basic Auth credentials are Base64-encoded, not encrypted - only use over HTTPS. Everything runs locally in your browser; credentials never leave your device.