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What is JWT?
JSON Web Token is a compact, URL-safe token with header, payload, and signature parts defined by RFC 7519. Servers use it to verify identity and claims without a session store.
Related tools
Try these DevStackIO tools for JWT:
JWT DecoderDecode and inspect JWT header, payload and expiry locally. Debug tokens securely in browser.Open tool →JWT GeneratorCreate signed JWTs (HS256/RS256) from header+payload locally. Use when creating test tokens; for inspecting existing tokens use jwt-decoder, for Base64 parts use base64. Input: JSON header/payload + secret. Returns JWT string. 100% client-side.Open tool →
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About this glossary
Definitions are written in plain language and sourced from MDN Web Docs, W3C specifications, and RFCs. Related tools run 100% in your browser — no data leaves your device.
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