JWT Decoder - Debug JSON Web Tokens | ToolsAid
Debug and Decode JSON Web Tokens (JWT). Inspect headers and payload claims locally. View token structure without signature verification for quick debugging.
key Features
- Decode header, payload, and signature
- Human-readable date format for 'exp' and 'iat'
- Color-coded JSON output
- Works offline/locally
The JWT Decoder allows you to inspect the contents of a JSON Web Token. JWTs are commonly used for authentication in modern web applications (e.g., logging in).
This tool decodes the Base64Url encoded parts of the token so you can read the claims (like User ID, Expiry Date, Roles). Note: We do not verify the signature, we simply display the data contained within the token.
Related Tools
Base64 Converter
Secure Online Base64 Converter. Encode and decode text or files instantly. 100% client-side processing ensures your data remains private and never hits a server.
URL Encoder/Decoder
Free URL Encoder and Decoder. Encode special characters (Percent-encoding) for safe transmission or decode complex URLs into readable text instantly.
HTML Entity Encoder
HTML Entity Encoder & Decoder. Convert special characters to HTML entities and back. Protect your site against XSS attacks and ensure safe code rendering.
Hash Generator
Secure Online Hash Generator. Generate MD5, SHA-1, SHA-256, and SHA-512 hashes. Verify file integrity and secure your passwords with client-side hashing.
Find this tool helpful?
If these tools save you time, consider supporting the development. Your support helps keep the server running and new tools coming!
Buy me a coffee