100% Client-Side Processing • No Server Uploads
JWT Decoder (JSON Web Token)
Inspect JSON Web Tokens (JWT) directly in your browser. Decodes Header and Payload JSON, formats standard timestamps (iat, exp), and alerts if token is expired. Never sends your secret token to a server.
Private & Local: Files are processed directly in your browser and never uploaded.
Token Active / Valid
Expires: Tue, 01 Jan 2030 00:00:00 GMT
Issued Timestamp (iat)
Thu, 18 Jan 2018 01:30:22 GMT
Header (Algorithm & Token Type)
{
"alg": "HS256",
"typ": "JWT"
}Payload (Claims & User Data)
{
"sub": "1234567890",
"name": "Alex Morgan",
"admin": true,
"iat": 1516239022,
"exp": 1893456000
}Signature Hash
4-vS1y5x67Z8-qN2uM3-EXAMPLE-SIGNATURE
Key Features
- 100% private: Token never leaves your computer
- Formats header algorithm and payload claims cleanly
- Automatic expiration check with UTC dates
- Syntax validation with clear error reporting
Our Privacy Commitment
Unlike traditional utility websites that upload your personal documents to cloud servers, Privatify Tools executes entirely inside your browser using WebAssembly and modern browser APIs.
Your files never leave your device, ensuring maximum confidentiality for contracts, financial statements, and personal photos.
Frequently Asked Questions
Is it safe to paste production API tokens here? ▼
Yes! Unlike public web tools that might log your token on their server, this tool runs 100% client-side. Zero network requests are made.