JWT Encoder & Decoder - Inspect JSON Web Tokens
Encode, decode, and inspect JSON Web Tokens in your browser. Work with headers, payloads, and HMAC algorithms for development and testing.
JWT ENCODER/DECODER
JSON Web Tokens (JWT) are a compact, URL-safe claims format. A verified signature can protect integrity and authenticity, but the header and payload remain readable because JWT encoding is not encryption.
Encoding, decoding, and supported HMAC signature checks run in your browser. The JWT tool does not send entered tokens or signing keys to SavvyToolz.
Frequently Asked Questions
- Is this JWT tool secure?
- Encoding, decoding, and supported HMAC signature checks run in your browser, and entered keys or tokens are not sent to SavvyToolz. Treat decoded claims as untrusted unless you verify the signature and application-specific requirements.
- What algorithms are supported?
- Currently we support HMAC-based algorithms: HS256, HS384, and HS512.
- Can I verify JWT signatures?
- Yes! Use the signature verification section to enter your secret and verify the JWT signature.
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