JWT Decoder

How to use JWT Decoder

Paste your input on the left, choose the options you want, and the output appears instantly on the right. Everything runs in your browser — none of your data is sent to a server.

• Paste or type your input in the INPUT panel
• The output regenerates automatically as you type
• Use Copy to put the result in your clipboard
• Click Sample to load a working example

What is JWT Decoder?

JWT Decoder decodes any JSON Web Token and shows you the header, payload, and signature parts. It detects token expiry and displays the claims in a readable format. Your token never leaves your browser — all decoding is done locally. This tool is part of santekno's developer toolbox — a curated collection of utilities built for engineers who care about speed, privacy, and simplicity.

Common use cases

• Debugging API payloads and integration issues
• Inspecting tokens, hashes, or encoded strings during development
• Generating fixtures and sample data for tests
• Sharing readable output with teammates in code reviews

FAQ