Decode and inspect JSON Web Tokens locally in your browser. Verify expiration times, inspect claims, and examine headers without exposing private keys.
Decoding shows the contents only. The signature is not checked, so this tool cannot confirm that a token is authentic or safe to use.
{
"alg": "HS256",
"typ": "JWT"
}{
"sub": "usr_104921",
"name": "Alex Morgan",
"email": "alex@exismic.xyz",
"iat": 1516239022,
"exp": 1916239022
}Decode and inspect JSON Web Tokens locally in your browser. Verify expiration times, inspect claims, and examine headers without exposing private keys.
Fast and easy from start to finish
Paste Token: Drop your three-part JSON Web Token string into the input area.
Inspect Claims: Read the parsed header details, payload data, and expiration timer.
Copy Output: Copy the formatted JSON payload or header with a single click.
What you can do with this tool
Live token header and payload JSON inspection with syntax formatting
Automatic expiration status check with human-readable timestamps
Built-in sample tokens for quick reference and testing
100% Client-side operation ensuring sensitive tokens never leave your computer
Unlock batch scale, higher resolution, and expanded limits
Compare two JWT tokens side-by-side to spot changed permissions.
Set reminders before API authorization tokens expire.
Filter complex JSON payloads by user roles, organizations, and permissions.
Answers to common questions about JWT Decoder & Token Inspector
Yes, decoding runs completely in your local browser memory. No token is ever sent over the network.
This tool inspects and decodes the token claims. Signature verification requires your private server secret.
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