JWT Decoder
Decode JSON Web Tokens instantly to see their header and payload. Your data never leaves your device.
● This tool runs entirely in your browser. No data is uploaded or stored, and signature verification is not performed.
Frequently Asked Questions
What is a JWT?
A JSON Web Token (JWT) is a compact, URL-safe token format used for securely transmitting information between parties as a JSON object.
Is it safe to paste my JWT here?
Yes. All decoding happens locally in your browser. No tokens are transmitted to any server or stored anywhere.
Can this tool verify JWT signatures?
This tool decodes the header and payload for inspection. Signature verification requires the signing key and is not performed here.