What is HTTP Basic Authentication?

HTTP Basic Authentication sends a username and password encoded in Base64 in the Authorization header. The format is "Basic base64(username:password)".

How do I generate a Basic Auth header?

Enter your username and password. The tool generates the Base64-encoded Authorization header value you can use in API requests.

Basic Authentication Encode / Decode

Generate or decode HTTP Basic Authentication headers.

Encode

Username

Password

Decode

Basic Auth Header or Base64 String

About the Basic Auth Encode / Decode

Generate or decode HTTP Basic Authentication headers. Create Base64-encoded Authorization header values.

The Basic Auth Encode / Decoderuns entirely in your browser — your data is never uploaded to a server, so it stays private and works instantly, even offline. It's completely free, requires no sign-up, and works on desktop and mobile.

Frequently Asked Questions

What is HTTP Basic Authentication?: HTTP Basic Authentication sends a username and password encoded in Base64 in the Authorization header. The format is "Basic base64(username:password)".
How do I generate a Basic Auth header?: Enter your username and password. The tool generates the Base64-encoded Authorization header value you can use in API requests.

Related tools

URL Encode / Decode
Base64 Encode / Decode
HTML Entity Encode / Decode
JWT Decoder