DocomintDécodeur JWT
Décodez l'en-tête et la charge utile d'un JSON Web Token dans votre navigateur.
🔒 Processed on your device
How it works
- Paste a JWT
- Its header and payload are decoded instantly, on your device
- Read the claims — this does not verify the signature
Frequently asked questions
Is my file uploaded anywhere?
No — this tool runs entirely in your browser using JavaScript/WebAssembly. Your file is never sent to a server.
Does this verify the token's signature?
No — this decodes the header and payload only. It doesn't cryptographically verify the signature against a trusted key, so don't treat a decoded token as validated.