JWT Decoder
Paste a JWT (JSON Web Token) and instantly see the decoded header, payload, and signature. The tool shows the expiration time, flags expired tokens, and highlights iat/nbf claims. Runs entirely in your browser — no network call, so it's safe to paste production tokens. Signature verification is intentionally out of scope (decode only).
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About JWT Decoder
Decode any JWT token. See header, payload, expiry, and signature in a clean layout. 100% client-side — your token never leaves your browser. This tool runs entirely in your browser — no data is sent to any server. Your content stays private and secure. MarkdownMe provides free, fast, and reliable Markdown tools for developers, writers, and anyone who works with Markdown.