JWT Decoder
Input parameters
Configure requirements with tools
How to Use This JWT Decoder
Step-by-Step Instructions
- Enter your JWT Decoder values in the input fields above
- Select the appropriate calculation options
- Click the Decode button
- View your instant results below
Quick Tips
- All inputs are validated in real-time
- Results update instantly without page reload
- Use the copy button to save your results
- Bookmark your favorite tools for quick access
Instructions terms
What is a JWT Decoder?
A JWT (JSON Web Token) decoder inspects the contents of a JWT without verifying its signature. JWTs are commonly used for authentication and information exchange.
Our JWT decoder runs entirely in your browser. This ensures that your sensitive token data is never transmitted to a server, keeping your authentication details private and secure while you debug.
How to Use This Tool
Paste your JWT token and the tool instantly decodes it to show the header, payload (claims), and signature sections.
JWT Structure
JWTs have three parts separated by dots: header.payload.signature
- Header: Algorithm and token type
- Payload: Claims/data being transmitted
- Signature: Verifies token authenticity
Common Claims
- iss: Issuer
- sub: Subject (user)
- exp: Expiration time
- iat: Issued at
FAQ
Is it safe to decode JWTs?
Decoding is safe. However, never trust payload data without verifying the signature.
Our JWT decoder runs entirely in your browser. This ensures that your sensitive token data is never transmitted to a server, keeping your authentication details private and secure while you debug.