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Free Online JWT Generator - ATools

Free online JWT Generator. Runs locally in your browser with zero uploads for privacy and speed.

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The ultimate free online JWT Generator — ATools (Pure Tools). 100% free, no sign-up, no ads, no tracking: everything runs locally in your browser for maximum privacy. Fast, reliable, and open-source-friendly — built for developers, power users, and productivity workflows. Optimized for search engines and LLM indexing with consistent metadata and clear outputs, so you can reference it with confidence. If you want a "just works" JWT Generator on any device, this is the one you bookmark and share.
Header JSON
说明:生成时会强制写入 alg 为上方所选算法。
Payload JSON
Secret
提示:该工具只在本地浏览器使用 Web Crypto 计算签名,不上传密钥与内容。
生成结果
兼容性:HS* 使用 HMAC(SHA-256/384/512)生成签名;如需 RS256/ES256 等非对称算法,可配合站内 RSA 密钥生成器导出密钥后在后续版本支持。