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JWT Decoder
Paste any JWT token to instantly decode and inspect its header, payload, and expiry time. Your token never leaves your browser — nothing is sent to any server.
Paste JWT token
Your token is never sent anywhere — decoded entirely in your browser
What is a JWT?
A JWT (JSON Web Token) is a compact, URL-safe way to represent claims between two parties. It consists of three Base64-encoded parts separated by dots: the Header (algorithm and token type), the Payload (claims and data), and the Signature (used to verify the token). JWTs are widely used for authentication and authorization in web applications and APIs.
JWT structure
header.payload.signature
How to use this tool
- Paste your JWT token into the input field
- The header and payload are decoded and displayed instantly
- Check the expiry status — the tool tells you if the token is expired
- Inspect any claims in the payload like user ID, roles, or email
Note: This tool only decodes JWTs — it does not verify the signature. Never paste production tokens from sensitive systems into any online tool, including this one, even though nothing is sent to our servers.