Basic Auth Generator

Basic Auth turns your username and password into a single header value. The format is always the same: join them with a colon (username:password), Base64-encode that string, then prepend the word Basic and a space. That's the entire spec. This tool does that encoding for you — paste your credentials in, copy the result, and drop it into the Authorization header of whatever HTTP request you're building. It's the fastest way to protect an internal tool, a staging environment, or a dev API without setting up a full auth system.

Base64 encoding is not encryption — this matters more than people realise

Anyone who intercepts the request can decode it in two seconds. The only reason Basic Auth is acceptable at all in production is that it runs over HTTPS, which encrypts the transport. Over plain HTTP, your credentials travel in what is effectively cleartext. So the rule is simple: always use HTTPS with Basic Auth, no exceptions. One less-obvious quirk: if your username contains a colon, the server will split on the first colon and treat everything before it as the username and everything after as the password. Colons in the password are fine. But a colon in the username breaks the format silently — the server just gets unexpected credentials and rejects the request without an obvious error message.

For anything more critical than a staging gate, consider switching to token-based auth or OAuth. Basic Auth has no way to expire credentials, no revocation mechanism, and every request re-sends the password.