Utility template
JWT Decoder
Decode JWT headers and payloads locally in your browser to inspect token contents without sending them anywhere.
Category: Web
Tool interface
JWT input
Decode a token locally to inspect its header and payload. No verification is performed.
This tool only decodes visible JWT content locally in your browser. It does not verify signatures or confirm token trustworthiness.
Decoded header
Decoded payload
Signature
Shown as-is for inspection only.
Privacy
JWT decoding happens entirely in your browser. Tokens are not uploaded, stored, or verified on a server.
Why this template exists
Every utility uses the same foundation so new tools stay consistent across navigation, accessibility, mobile layout, and SEO.
How it works
Paste a JWT and Utiliful decodes the Base64URL header and payload locally in your browser, then formats them as readable JSON for inspection.