Paste a JWT with header.payload.signature
Designed to stay local. Core processing happens in your browser. Camera and microphone tools request device permission only after you start them.
How to use this tool
Inspect the header and payload of a JWT without sending it away. Use the control to generate or inspect a value locally, then handle any sensitive output with appropriate care.
Tool guide
Use this short guide alongside JWT Decoder to understand the task it supports, prepare a clean input, and review the local result before using it elsewhere.
Inspect the header and payload of a JWT without sending it away.
Use the control to generate or inspect a value locally, then handle any sensitive output with appropriate care.
Treat generated or inspected values as sensitive where appropriate. Copy only what you need, store it safely, and use trusted workflows for any account or system access.
Frequently asked questions
Inspect the header and payload of a JWT without sending it away.
Yes. This browser-based Lighter utility is free to use and does not require an account for its core workflow.
The core workflow is designed to run locally in your browser.
Use the control to generate or inspect a value locally, then handle any sensitive output with appropriate care.
Keep working with related browser-based utilities.
