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All ToolsVerify & Decode JWT
Verify & Decode JWT
Decode JWT tokens to inspect header and payload. Optionally verify HS256 signatures with a secret key.
What is Verify & Decode JWT?
Verify & Decode JWT is a free online tool that decodes and inspects JSON Web Tokens. See the decoded header, payload, and signature in a color-coded view. Optionally verify the signature using a secret key (HS256).
How It Works
The tool splits the JWT at the dots and Base64URL-decodes the header and payload. The expiry (exp) claim is checked against the current time. For optional HS256 verification, the tool uses SubtleCrypto to compute the expected signature and compares it byte-by-byte.
Key Benefits
- Decodes header and payload without any secret
- Shows expiry status: valid, expired, or no expiry
- Optional HS256 signature verification with secret
- Color-coded header, payload, and signature
- No data sent to any server
Frequently Asked Questions
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