Basic Auth Header Generator
Generate and decode HTTP Basic Authentication headers with curl and fetch examples.
Frequently Asked Questions
What is HTTP Basic Authentication?
HTTP Basic Authentication is a simple authentication scheme built into the HTTP protocol. The client sends the username and password encoded in Base64 as part of the Authorization header. While easy to implement, it should always be used over HTTPS since Base64 is encoding, not encryption.
How is the Basic Auth header constructed?
The header is formed by combining the username and password with a colon (username:password), then Base64-encoding that string. The result is prefixed with 'Basic ' to form the full header value: Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=
Is Basic Auth secure?
Basic Auth by itself is not secure because Base64 can be easily decoded. However, when used over HTTPS (TLS), the entire request including headers is encrypted, making it reasonably secure for server-to-server communication and simple API authentication.
Can I decode a Basic Auth header?
Yes — switch to Decode mode and paste the full Authorization header or just the Base64-encoded part. The tool will extract the username and password by decoding the Base64 string.
When should I use Basic Auth?
Basic Auth is suitable for simple API authentication, internal tools, CI/CD pipelines, and quick prototyping. For production user-facing applications, consider OAuth 2.0, JWT tokens, or API keys instead.