JWT Decoder
Decode header & payload — locally in your browser.
Tool
Paste your input and get output instantly. Everything stays in your browser.
Signature
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Status
Ready
✓ Runs locally
✓ No uploads
✓ No tracking
What the tool does
JWT Decoder decodes JWT headers and payloads into readable JSON without validating signatures.
When to use it
Use it to inspect token claims, roles, expiration times, and metadata during debugging.
Quick example
Paste a JWT and instantly view its decoded contents.
Security / privacy
Tokens are never sent to a server. No logging, no tracking, no storage.