Username Length
0
HTTP Basic Auth Generator
Online HTTP Basic Auth generator with Base64 header encoding, instant copy, and auth preview for API testing, HTTP debugging, and integration work
Credentials
Use UTF-8 for modern HTTP services and any credentials that include Chinese text, emoji, or other special characters.
Username emptyPassword emptyCharset: UTF-8 (Recommended)Local processing only
Password Length
0
UTF-8 Bytes
1
Base64 Length
4
Authorization Header
Generate a ready-to-copy Authorization: Basic header in real time.
Documentation
Features
- Enter a username and password to generate an
Authorization: Basic <Base64>header with UTF-8 encoding. - Switch between UTF-8 and ISO-8859-1 when you need to match either modern services or older Basic Auth implementations.
- Copy the raw Base64 token separately when another tool or config field only needs the token value.
- All processing stays in the browser and does not upload credentials to any server.
Use Cases
- Build HTTP Basic Auth headers quickly during API integration and request debugging.
- Test legacy systems, internal services, or gateway endpoints that still rely on Basic authentication.
- Check header formatting, encoding issues, and credential copy mistakes during troubleshooting.
Notes
- Basic Auth only Base64-encodes
username:password; it does not encrypt the credentials, so HTTPS is still required in production. - A Basic Auth username cannot contain a colon
:, because the first colon is reserved as the username/password separator. - If the username or password contains spaces, Chinese characters, or other special symbols, generate the header here instead of encoding by hand.
- If a legacy endpoint requires ISO-8859-1 but the credentials contain Chinese text, emoji, or other unsupported characters, switch to UTF-8 or change the credential content.
- Clear sensitive values after debugging, especially when you are using a shared device.