Developer Tools
Decode JWT header and payload data into a readable format for quick inspection.
Use this JWT decoder to inspect the readable parts of a JSON Web Token directly in the browser. It is useful for authentication debugging, API integration checks, reading claims, checking expiry fields, and understanding token contents without manually decoding the Base64URL parts yourself.
Use this JWT decoder to inspect the readable parts of a JSON Web Token directly in the browser. It is useful for authentication debugging, API integration checks, reading claims, checking expiry fields, and understanding token contents without manually decoding the Base64URL parts yourself.
Use jwt decoder when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjMifQ.signature
Output
Decoded header and payload
Shows the readable JWT sections without verifying the signature.
Input
A copied auth token from an API test
Output
Readable claims and token metadata
Useful for quick auth troubleshooting.
Fix: Remember that decoding is not the same as signature verification.
Fix: Paste the full JWT including all dot-separated parts.
Fix: Check whether the token was copied fully and correctly.
It decodes the readable parts of a JSON Web Token such as the header and payload.
No. Decoding only reads the token content and does not verify the signature.
It helps inspect claims, expiry data, and token structure during debugging.
Yes. It works online in the browser.
Decoding shows readable content, while verification checks whether the signature is valid.