What is JWT Encoder/Decoder?

JWT Encoder/Decoder is a free online tool. Encode and decode JWT tokens to inspect header and payload No signup required - use it directly in your browser.

Is JWT Encoder/Decoder free?

Yes, all tools provided by WebTools are completely free to use with no signup required.

Is JWT Encoder/Decoder safe?

Absolutely safe. All data processing happens locally in your browser. Nothing is uploaded to any server, ensuring your privacy is fully protected.

Do I need to install software to use JWT Encoder/Decoder?

No installation needed. All tools run in your browser - just open the page and start using them immediately.

JWT (JSON Web Token) is an open standard (RFC 7519) for securely transmitting information between parties as a JSON object. It's commonly used for authentication and authorization in web applications. A JWT consists of three parts: header, payload, and signature, separated by dots.

Is decoding a JWT the same as verifying it?

No. Decoding a JWT simply reads the base64url-encoded header and payload. Verification requires checking the signature using the secret key or public key. This tool decodes JWTs but does not verify signatures.

What are common JWT claims?

Common claims include: iss (issuer), sub (subject), aud (audience), exp (expiration time), nbf (not before), iat (issued at), and jti (JWT ID). Custom claims can also be included.

Is it safe to paste my JWT here?

Yes. All JWT decoding happens entirely in your browser using JavaScript. Your token is never sent to any server. However, be cautious about sharing JWTs as they may contain sensitive information.

What happens when a JWT expires?

When a JWT's exp claim time has passed, the token is considered expired. Most APIs will reject expired tokens and require the client to obtain a new one (usually via a refresh token). This tool highlights expired tokens in red.

JWT Encoder/Decoder

JWT Decoder is a free online tool that helps you decode and inspect JSON Web Tokens (JWT). It parses the token's header, payload, and signature, displaying all claims in a readable format with expiration verification — no signup, no installation, completely private.

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JWT Token

JWT Decoder Info

JWT (JSON Web Token) is an open standard for securely transmitting information between parties.

JWT consists of three parts: Header, Payload, and Signature, separated by dots.

Expiry CheckClaims Parse

What is JWT Decoder?

Decode JWT header, payload, and signature sections
Display all claims in a readable, formatted view
Automatic expiration check with time-remaining indicator
Color-coded token sections for easy identification
One-click copy decoded header or payload as JSON
Support for HS256, RS256, and other common algorithms
All processing happens locally in your browser

How to Use JWT Decoder

1
Paste your JWT
Copy your JWT token and paste it into the input field.
2
View decoded header
The header section (algorithm and token type) is decoded and displayed automatically.
3
View decoded payload
The payload section (claims like sub, iat, exp) is decoded and shown in a readable format.
4
Check expiration
If the token has an exp claim, the tool shows whether it's expired and when it expires.

Frequently Asked Questions

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