JWT Decoder
Decode and inspect JSON Web Token headers, payloads, and signatures with expiration time validation
How to Use This Tool
Paste your JWT token into the input field.
Header, Payload, and Signature are decoded and displayed instantly.
Timestamp fields are automatically converted to readable dates.
Check the expiration status indicator to see if the token is valid.
About This Tool
JWT Decoder parses JSON Web Tokens into color-coded sections — Header (algorithm), Payload (claims), and Signature. Timestamps like exp and iat are converted to readable dates. The expiration indicator shows whether the token is still valid. Runs locally — your tokens are never sent anywhere.
Frequently Asked Questions
Yes. Everything runs locally. However, be cautious about sharing JWTs as they may contain sensitive payload data.
Signature verification requires the secret/public key. This tool only decodes and displays token contents.
Share This Tool
Related Tools
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting, error detection, and tree view
HTML Encoder/Decoder
Encode and decode HTML entities, special characters, and Unicode symbols for safe web content
URL Encoder/Decoder
Encode and decode URLs and query parameters for safe transmission in web applications and APIs
Base64 Encoder/Decoder
Encode and decode text or binary data in Base64 format for embedding images, APIs, and data transfer
Regex Tester
Test, debug, and validate regular expressions with real-time matching, group highlighting, and flag support
CSS Minifier
Minify CSS code to reduce file size and improve page load performance with compression statistics