Basic Auth Header Generator
Generate an HTTP Basic Authentication header from a username and password.
Last updated August 26, 2026
About this tool
HTTP Basic Authentication sends credentials as a Base64-encoded “username:password” string in the Authorization header — simple to implement, but not encrypted, so it should only ever be used over HTTPS. This tool builds the encoded token and full header value for testing APIs, configuring API clients, or debugging authentication issues.
Frequently asked questions
Is Basic Auth secure?
The credentials are only Base64-encoded, not encrypted — anyone who intercepts the request can decode them instantly. Basic Auth is only safe to use over HTTPS, where TLS encrypts the entire request including this header.
What format does the Authorization header use?
It’s "Authorization: Basic " followed by the Base64 encoding of "username:password" — exactly what this tool generates.