Decode headers and payloads
Start the core JWT Lab workflow without leaving the MachKit toolbox.
Network & Security
JWT Lab, available locally on your Mac.
JWT Lab keeps token work on the Mac. Decode headers and payloads, inspect claims, validate structure, and create tokens locally when debugging auth flows—without pasting secrets into an unknown website.
Inspect and validate claims
Keep the working input and generated result on the Mac.
Create tokens locally
Copy or continue with the result from the same consistent utility window.
What it covers
See the capability and the boundary together.
What JWT Lab is designed to do
JWT Lab keeps token work on the Mac. Decode headers and payloads, inspect claims, validate structure, and create tokens locally when debugging auth flows—without pasting secrets into an unknown website.
- Decode headers and payloads
- Inspect and validate claims
- Create tokens locally
Keep sensitive working data out of online converters
MachKit runs this utility as bundled local content. It does not require an account, analytics service, remote script, or cloud storage for the tool input.
- Bundled with the native Mac app
- No analytics or advertising
- No upload required for local transformations
Use one utility without installing another standalone app
JWT Lab shares MachKit’s searchable tool catalog, light and dark appearance, localization, clipboard feedback, and configurable global shortcuts.
- Part of the Network & Security category
- Searchable from the MachKit tools workspace
- Available through an optional global shortcut