Basic Auth Generator

What is Basic Auth Generator?

Basic Auth Generator constructs HTTP Basic Authentication headers by Base64-encoding a username:password pair and formatting it as the standard Authorization header value. It produces the complete header string ready to paste into HTTP clients like curl, Postman, or fetch requests. The tool also decodes existing Basic Auth headers to reveal the credentials, and warns when credentials contain special characters that need proper encoding.

Backend developers testing authenticated endpoints, DevOps engineers configuring reverse proxy authentication, and security teams auditing credential exposure in logs. The tool runs entirely in your browser — your data never leaves your device.

How to Use Basic Auth Generator

1. Enter the username and password in their respective fields
2. The tool instantly generates the Base64-encoded credentials and full Authorization header
3. Copy the complete header value including the 'Basic ' prefix for direct use in HTTP requests
4. To decode, paste an existing 'Basic ...' header value to reveal the username and password

Common Use Cases

• Generating Authorization headers for testing protected API endpoints in curl commands
• Creating Basic Auth headers for CI/CD pipeline configuration files
• Decoding existing Basic Auth headers found in server logs to verify credential usage
• Setting up Basic Auth for static site hosting on platforms like Nginx or Apache

Pro Tips

• Basic Auth transmits credentials in Base64 which is encoding, not encryption — always use HTTPS to prevent interception; anyone with the header value can trivially decode it
• If the username contains a colon, some servers will split on the first colon only — but this is implementation-dependent and can cause authentication failures
• For automated systems, prefer API keys or OAuth tokens over Basic Auth — if Basic Auth credentials leak, changing them requires updating every client simultaneously

Why Use This Tool?

• Privacy-first: All processing happens locally in your browser. No data is transmitted to any server.
• No installation required: Works in any modern browser on desktop or mobile.
• Completely free: No account, no credit card, no usage caps.
• Fast and reliable: Powered by modern Web APIs for near-instant results.

Related Concepts

Learn more about related topics: HTTP authentication, Base64 encoding, Authorization header, RFC 7617.

Frequently Asked Questions