JWT Decoder & Signature Verifier
Inspect a JWT and verify its signature when you have the required key.
⚡ Free
◈ Local-first
✓ No account
Result
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JWT Decoder & Signature Verifier
Paste a JWT to decode its header and payload. Optionally provide an HS256 shared secret or an RS256 public key to verify the signature. Without a key, NuvaTools only decodes the token and does not claim it is authentic. Processing stays locally in your browser.
Free
Core utility with no mandatory account.
Local-first
Browser processing whenever technically possible.
NuvaTools
Focused interface without unnecessary friction.