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Developer ToolsFree online tool
Decode the readable header and payload portions of a JWT locally for inspection.
Paste or enter the data you want to process, then run the tool.
Related guideTechnology Guide
Learn what AI agents are, how they use tools and permissions, what they can do, and the practical security controls to understand before giving an agent access.
Read guideUse the controls above, check the result, then copy or download it when available.
No. Signature verification and issuer, audience and expiry checks must be performed by the application.
Use this tool whenever you need: Debugging authentication flows and checking claims during development. It offers a fast, client-side workflow without sign-ups, installation or complex software.
Yes. All processing executes locally in your browser using client-side JavaScript. Your inputs, files and calculations remain private and are never uploaded to our servers.
Decoding a JWT does not verify its signature. Never trust claims merely because they can be decoded. Important note: This tool does not authenticate tokens or prove that a token was issued by a trusted service.
Developer utility
Inspect the header and payload of a JSON Web Token without sending it anywhere.
1. Token
Three dot-separated parts
Your decoded token will appear here
Paste a JWT above and choose Decode token to inspect its readable parts.