🔑 Basic Auth Header Generator
Generate and decode HTTP Basic Authorization headers locally in your browser.
What is a Basic Auth Header Generator?
A Basic Auth header generator creates the HTTP Authorization header used by Basic authentication. In Basic auth, the client sends a username and password combined as username:password, then Base64-encodes that value. The final request header looks like this: Authorization: Basic <token>. This method is simple and still common in internal APIs, development environments, and legacy systems.
Developers often need to manually build this header while testing endpoints with curl, Postman, browser fetch scripts, or reverse proxy setups. Typing or encoding the token by hand can introduce mistakes, especially when credentials include special characters. This tool removes that friction by generating the token and full header instantly from input values.
The page also includes a decode workflow. You can paste either the full Authorization header or the raw Base64 token to recover the original username and password. This is useful during debugging and incident response when you need to verify what credentials were used in a captured request log. Everything runs client-side in your browser, so no credentials are sent to a backend by this page logic.
How to Use This Tool
- Enter a username and password in the generator fields.
- Click Generate or use live updates while typing.
- Copy the Base64 token or the full Authorization header.
- Paste a header or token into the decode box when needed.
- Click Decode to view parsed username and password values.
Key Features
- Generates Basic auth token and full Authorization header.
- Handles Unicode credentials with UTF-8 encoding.
- Decodes full headers or raw Base64 tokens.
- Copy buttons for fast API testing workflows.
- Runs fully in the browser for local processing.
Frequently Asked Questions
Is Basic auth secure?
Basic auth is only safe over HTTPS. Without TLS, credentials can be intercepted. Always use HTTPS in production.
Does Base64 encrypt credentials?
No. Base64 is an encoding format, not encryption. Anyone with the token can decode it back to plaintext username and password.
When should I use Bearer tokens instead?
Bearer tokens are common for modern OAuth and JWT flows. Basic auth is usually best for simple service integrations or legacy endpoints.
Does this tool store my credentials?
No. Input and output are processed in-page and not uploaded by this tool logic.