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HTTP Basic Auth Generator

Encode and decode HTTP Basic Authentication headers. Generate Authorization: Basic headers from username and password, or decode existing headers to extract credentials. Runs entirely in your browser — your data never leaves your machine.

http basic-auth authorization headers base64

Published May 31, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Enter a username and password to generate an Authorization: Basic header. The credentials are combined as username:password and Base64-encoded. Switch to decode mode to extract credentials from an existing header.

Features

  • Encode mode: generate Authorization headers from username and password
  • Decode mode: extract credentials from Basic auth headers or raw base64
  • Flexible input: accepts Basic <token>, Authorization: Basic <token>, or raw base64
  • Password with colons: correctly handles passwords containing colon characters
  • Validation: checks for invalid characters and encoding errors
  • 5 preset examples: Simple Login, API Key, Email User, Token Auth, Special Chars
  • Private: all computation runs in your browser — no data transmitted

Use Cases

  • Generating auth headers for API testing with curl or Postman
  • Debugging HTTP authentication issues
  • Decoding Basic auth headers from server logs
  • Setting up CI/CD pipeline credentials
  • Testing webhook authentication configurations