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JWT Decoder

Decode JWT tokens to view payload, header, and verify signatures

Enter the secret key used to sign the JWT. Only HS256 algorithm is currently supported.

JWT Structure

header.payload.signature

About JWT

Note: This decoder can verify HMAC-SHA256 (HS256) signatures when you provide the secret key. For other algorithms (RS256, ES256, etc.), signature verification is not yet supported. Always verify signatures server-side before trusting any data from a JWT.

Warning: This decoder only decodes and displays the token content. It does not verify the cryptographic signature. Always verify signatures server-side before trusting any data from a JWT.