JWT Decoder Online - Decode and Inspect JSON Web Tokens

Decode and inspect JWT (JSON Web Tokens) instantly. View header, payload, and signature. Free JWT decoder for developers.

100% FreeLocal DecodeExpiry Check
JWT Token
Header
Paste a JWT to decode...
Payload
Paste a JWT to decode...
Signature
Signature cannot be decoded without the secret key.
Decode JWT header and payload
Check token expiry
100% local processing

Frequently Asked Questions

How does JWT decoding work?

JWT tokens have three parts separated by dots. This tool decodes the header and payload (which are Base64URL encoded) locally in your browser. No data is sent to any server.

Can I verify a JWT signature?

No, signature verification requires the secret key and cannot be done without it.

Is this free?

Yes, completely free with no signup required.

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