JWT Tools

Decode and verify JSON Web Tokens, convert JWKS entries to PEM, and inspect RSA/EC keys — all client-side, using the browser's Web Crypto API. Your tokens and keys never leave your device.

🔑JWT Decoder / Generator

Decode, verify HS/RS/ES signatures, check claims

🗝️JWKS to PEM Converter

Convert a JWKS entry to PEM

🔬PEM Key Inspector

Inspect an RSA/EC public or private key

🗂️JWKS Inspector

Audit every key in a JWKS at once

JWT Tools

Common JWT errors

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