Security Utility
JWT Decoder & Expiry Checker
Safely decode JSON Web Tokens, inspect payload claims, and check expiration time without sending data across the network.
100% In-Browser Client-Side — Zero Server Uploads
Client-side only. Your sensitive credentials and tokens are never sent to a server.
Token Is Currently Valid
Expires on: Jan 14, 2036, 8:58:42 PM
Header (Algorithm & Type)
{
"alg": "HS256",
"typ": "JWT"
}Payload (Claims & Data)
{
"sub": "usr_1289012",
"name": "Alex Rivera",
"admin": true,
"iat": 1516239022,
"exp": 2083957122
}Signature Hash
sP6s9bZ0sDk1z9K3x6V2l0M9p8R7y5W4q3Z2X1
Why Privacy-First JWT Decoding Matters
JSON Web Tokens often contain user email addresses, user IDs, permission scopes, and session metadata. Pasting them into third-party sites that send requests to a server risks credential leakage. PicoFix guarantees 100% in-browser parsing.
Frequently Asked Questions
Helpful answers to common image compression questions.
Yes. PicoFix operates 100% client-side in your browser using pure JavaScript. Your tokens, authorization headers, and claims are never transmitted to any server or logged.
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