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Free Online JWT Decoder - ATools

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

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The ultimate free online JWT Decoder — 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 Decoder on any device, this is the one you bookmark and share.
JWT 输入
说明:该工具仅解码并展示 header/payload,不进行签名验证(不会要求你输入密钥)。
结构信息
算法:-
类型:-
过期(exp):-
生效(nbf):-
签发(iat):-
签名段格式:看起来正常(可 Base64URL 解码)
提示:JWT payload 中的 exp/nbf/iat 通常是 Unix 秒时间戳;该工具会自动转换为本地时间显示。
Header
Payload
Signature