JWT Decoder
Decode Tokens
Decode JWT tokens instantly — view header, payload, and expiration details
What is JWT Decoder?
The JWT Decoder is a secure, client-side utility that allows developers to decode and inspect JSON Web Tokens (JWT). It easily separates and displays the token's Header, Payload, and Signature without requiring the secret key.
How to Use JWT Decoder
Paste Token
Paste your encoded JWT string into the input field.
View Header
Instantly see the decoded header, revealing the algorithm and token type.
Inspect Payload
Examine the decoded payload to view claims like user ID, roles, and expiration time.
Check Expiry
Quickly verify if the token has expired based on the 'exp' claim.
Key Features
Instant decoding of JWTs entirely in the browser
Clear separation of Header, Payload, and Signature components
Automatic formatting of JSON data for readability
Highlighting of essential claims like 'iat' (issued at) and 'exp' (expiration)
Secure operation—tokens are never sent to a server
Tips & Best Practices
- 1
Use this tool to debug authentication issues by verifying the claims encoded in your tokens.
- 2
Remember that decoding a JWT does not verify its validity; it only reveals its contents. Anyone can decode a JWT without the secret key.
- 3
Check the 'exp' claim if users are being unexpectedly logged out.
Why Use Our Online JWT Decoder?
Designed for speed, privacy, and precision. All operations occur seamlessly right inside your browser, ensuring your files and private data never touch remote servers. Enjoy lightning-fast processing with zero software installation required.
Frequently Asked Questions
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