ToolWren logo ToolWren
ToolWren › Token & Protocol Tools

Token & Protocol Tools

Inspect and create tokens and binary protocol messages — decode and sign JSON Web Tokens, parse CoAP packets, and convert CBOR to JSON — all client-side.

4 tools · 100% client-side · nothing is uploaded

🔑JWT

Decode a JSON Web Token to inspect its header and payload, with an automatic expiry check. Private — nothing is uploaded.

🔏JWT Generator

Create and sign a JSON Web Token (HS256/384/512) in your browser using the Web Crypto API. Private, nothing uploaded.

🛰️CoAP

Decode a CoAP binary message from hex: header, type, code, message ID, token, options and payload. RFC 7252, runs in your browser.

📦CBOR

Decode a CBOR binary payload from hex into readable JSON. Ideal for IoT, COSE and CoAP debugging. Runs in your browser.
Other categories
EncodingDataConvertersColorGeneratorsCalculatorsFinanceHealthDate & TimeTextCiphersAll tools →

Privacy: every tool in this category runs entirely in your browser. Your input is never sent to, received by, or stored on any server — no uploads, no tracking.