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JWT Decoder

Decode JWT header, payload, and standard claims locally.

Works offlineNo upload

Security: This decoder runs entirely in your browser. Your token is never sent to any server. However, decoding does not verify the signature — never trust a token just because it decodes. Do not paste live production tokens into any website you don't fully trust.

JWT token

Structure: A JWT has 3 parts separated by dots — header.payload.signature. Header and payload are Base64URL-encoded JSON. The signature is a cryptographic proof of authenticity that this tool cannot verify.

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Privacy: This tool processes your files locally in your browser whenever technically possible. Your files are not uploaded to linkiit servers. Always verify output for official or legal use.

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