Welcome to the most comprehensive JWT encoder and decoder tool! Instantly encode, decode, and verify JSON Web Tokens with support for all major algorithms including HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, ES512, PS256, PS384, and PS512. Our tool functions just like jwt.io, providing a secure, client-side solution where all data stays in your browser—nothing is sent to any server.
Whether you need to create JWT tokens, inspect existing tokens, or verify signatures, our intuitive interface makes it easy. Edit the header and payload to generate custom tokens, or paste an existing token to decode it instantly. Perfect for developers working with authentication, API security, and token-based systems.
All JWT encoding, decoding, and verification happens entirely in your browser using JavaScript. No data is ever transmitted to our servers or stored anywhere. Your tokens and secrets remain completely private and secure on your device.
Simply edit the HEADER and PAYLOAD sections on the right. The encoded JWT will be automatically generated in the left panel. You can customize the algorithm and add your secret key to create a signed token.
Paste your JWT token in the "Encoded" section on the left. The tool will automatically decode and display the header, payload, and signature information in the right panel.
We support all standard JWT algorithms: HMAC (HS256, HS384, HS512), RSA (RS256, RS384, RS512), ECDSA (ES256, ES384, ES512), and PSS (PS256, PS384, PS512). Choose the algorithm that matches your use case from the dropdown menu.