Developer Tools•Free & Browser-Based
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) into Header and Payload JSON without transmitting your token over the internet.
Token Expiration: Wed, 18 May 2033 03:33:19 GMT (Active / Valid)
{
"alg": "HS256",
"typ": "JWT"
}{
"sub": "1234567890",
"name": "Alice Smith",
"iat": 1516239022,
"exp": 1999999999
}Career PartnerSponsored
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What is the Free Online JWT Decoder?
A JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact, URL-safe means for securely transmitting information between parties as a JSON object. It consists of three parts separated by dots: Header, Payload, and Signature.
100% Client-Side Privacy: Calculations and data processing occur entirely in your local browser memory. Zero files or personal inputs are uploaded to our servers.
How to Use JWT Decoder Online: Step-by-Step Guide
- 1Paste your bearer token or JWT string.
- 2View the decoded Header (algorithm and token type) and Payload (claims, user ID, roles).
- 3Inspect the expiration date (`exp` claim) with automated expired/active status alert.
Pro Tips for Getting Accurate Results
- •Never share production secret keys or paste live production tokens into untrusted third-party servers. ToolNest decodes entirely in your browser.
Frequently Asked Questions About JWT Decoder
Decoding displays the payload data inside the token. Verifying the signature requires the secret or public RSA key, which should remain secure on your server.
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