Validate and decode JWT (JSON Web Tokens) instantly. View header, payload and signature clearly and securely. Free tool for developers, no registration, local processing.
JWT Validator and Decoder
Paste or enter a JWT token to validate and decode
About JWT Validator and Decoder
Professional tool to validate and decode JWT (JSON Web Tokens). JWT is an open standard (RFC 7519) used to securely transmit information between parties as a JSON object. This tool allows you to view the header (token metadata), payload (claims/data) and signature (signature) clearly and organized. Ideal for developers who need to debug tokens, verify claims, validate structure and understand JWT token content.
Why use our tool?
✓Complete JWT decoding
✓Token structure validation
✓Expiration (exp) and validity (nbf) checking
✓Formatted header and payload view
✓100% local and secure processing
How to use
• Paste the complete JWT token (header.payload.signature)
• JWT must have 3 parts separated by dot
• Check expiration date (exp) in payload
• Review claims (iss, sub, aud, etc.) in payload
• All processing is done locally in the browser
ℹ️ Important: This tool only decodes and validates the JWT structure. Signature validation requires the secret or public key, which is not processed here for security. No data is sent to our servers, ensuring complete privacy and security.