JWT Decoder
Developer ToolsDecode JSON Web Tokens instantly. Inspect the header, payload, and signature sections with syntax highlighting. View expiry status, algorithm info, and standard claim explanations.
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Frequently Asked Questions
Is it safe to paste my JWT token here?
The decoding happens entirely in your browser — no data is sent to any server. However, never share your JWT in public environments as it contains authentication data.
Can this tool verify JWT signatures?
Currently the tool decodes and displays JWT contents. Signature verification requires your secret key, which we deliberately do not request for security reasons.
What JWT algorithms are supported?
The decoder supports all standard JWT algorithms: HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, ES512, and PS algorithms.