文件在您的浏览器中计算哈希 — 绝不会离开您的设备。

验证文档

拖入任意文件，与透明账本进行核对。

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拖入文件或点击选择

文件在您的浏览器中计算哈希 — 绝不会离开您的设备。

Drop the finished document — the sealed PDF that carries the QR code. The unsigned original and any earlier version are recognised too; a re-saved or edited copy will not match.