Basic Auth Header Generator Online — Create Authorization Header
Generate an HTTP Basic Authorization header from a UTF-8 username and password locally in your browser.
About this tool
This tool joins username and password with a colon, encodes the UTF-8 bytes as Base64 and prefixes the result with Authorization: Basic.
How to use
- Enter the username.
- Enter the password and generate.
- Copy the header only into an authorized secure request.
Features
- UTF-8 Base64 encoding.
- Ready Authorization header.
- Local processing.
Common use cases
- Test protected APIs.
- Build a curl or client request.
- Verify server examples.
Common issues and tips
- Basic Auth is encoding, not encryption.
- Always use HTTPS and avoid exposing credentials in logs.
Privacy
Credentials remain in your browser and are not uploaded.
Frequently asked questions
Is Basic Auth encrypted?
No. Base64 is reversible; transport security must come from HTTPS.
What is encoded?
The UTF-8 text username:password.
Are credentials stored?
No, they remain in the page.