JWT tools

Decode and generate HS* JWTs locally with Web Crypto. LocalKit does not upload tokens for processing.

• JWT Decoder — Decode JWT header and payload without sending tokens away in LocalKit. Inspect claims locally in your browser—tokens are not uploaded for computation.
• JWT Generator — Create HS256/HS384/HS512 JWTs with Web Crypto in LocalKit. Signing stays on-device; pair with the JWT decoder.
• Base64 Encode / Decode — Encode or decode Base64 text entirely in your browser with LocalKit. Handy for data URLs and tokens—processing stays on-device with nothing uploaded for computation.
• Hash Generator — Compute MD5, SHA-1, SHA-256 and more digests locally in LocalKit. Verify checksums in your browser—hashes never leave your device and no account is required.

All listed tools run in your browser. LocalKit does not upload content for computation.