What Are JSON Web Tokens (JWT)?
JSON Web Tokens (JWT) are an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. JWTs are widely used for authentication and authorization in web applications.
JWT decoding is essential for:
- Debugging: Inspecting token contents during development.
- Security Auditing: Verifying token claims and expiration.
- API Development: Testing authentication flows in web services.
How to Use
- Paste your JSON: Copy a sample JSON response from your API or editor.
- Click Validate: Press the button to process your input.
- Review Output: Your result appears instantly in the output panel.
- Copy to Project: Use the Copy button to grab the result and paste it into your project.
Frequently Asked Questions
How are nested objects handled?
Nested objects generate their own named type definition, referenced from the parent type. This keeps your code organized and reusable.
How are arrays typed?
Arrays infer their element type from the first item. Arrays of objects generate a collection type of the corresponding object type.
Is this tool safe to use?
Absolutely. This tool operates 100% client-side. Your JSON data never leaves your browser and is processed locally. We do not store, track, or upload your data.
Related Tools
- JWT Validator — Validate JSON Web Tokens (JWT) by verifying signature, expiration (exp), and other standard claims.
- JSON Hash Generator — Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) of your JSON data for integrity verification and fingerprinting.