ตัวถอดรหัส JWT

What is JWT Decoder?

JSON Web Tokens (JWTs) are compact, URL-safe tokens used for authentication and data exchange in modern web apps. A JWT has three Base64URL-encoded parts: the header (algorithm), payload (claims), and signature. DailyDevTools' JWT Decoder instantly splits and decodes all three parts, displays human-readable timestamps, checks token expiry, and highlights the algorithm used — without ever sending your token to a server.

How to use JWT Decoder

1. 1Paste your JWT token (the string starting with 'eyJ...') into the input field
2. 2The decoder instantly shows the decoded Header, Payload, and Signature in separate panels
3. 3Check the Expiry indicator to see if the token is still valid based on the 'exp' claim
4. 4Hover over any timestamp field to see the human-readable UTC date and time

Frequently asked questions