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Build Authorization headers for Basic, Bearer, and API key authentication.
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Use the Basic Auth Encode tab to create an Authorization header from username and password.
Use Basic Auth Decode to recover credentials from a Basic header for debugging.
Use Bearer and API Key tabs to generate ready-to-copy headers for testing tools.
Preparing headers for API testing and QA
Debugging authentication failures from encoded credentials
Creating consistent auth templates for team documentation
Quickly switching between Basic, Bearer, and API key auth models
Authorization headers are required by most API gateways and backend services. This tool reduces manual formatting errors by generating the exact header string for each authentication type.
For Basic Auth, credentials are base64-encoded and should always be sent over HTTPS. For Bearer and API keys, keep secrets scoped and rotated according to your security policy.
Treat generated credentials as sensitive data. Use test keys whenever possible and avoid sharing production tokens in screenshots.
For Basic Auth, a common CLI approach is `echo -n 'user:pass' | base64`. This tool produces the same output with a visual workflow and built-in decode support.
If auth fails, check for extra spaces, missing prefixes (`Basic` or `Bearer`), incorrect header names, and token expiration before retrying requests.
Create and decode Basic Auth headers, plus generate Bearer and API key headers.