PDF Audit Trail & Digital Verification Certificate Generator
Create legal-grade digital certificates of completion with SHA-256 cryptographic hashes and verification QR codes.
在您的浏览器中运行。您的文件不会离开设备。 了解如何验证
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使用方法
- 1选择设置
填写信息或选择您需要的选项。
- 2查看结果
更改任何内容时，预览会立即更新。
- 3下载或保存
将结果保存到您的设备。不会向服务器发送或保存任何内容。
关于此工具
Generate an official Audit Trail and Digital Verification Certificate for any PDF contract or signed document. Computes client-side SHA-256 and SHA-512 cryptographic digests to prove the document has not been altered, records signer identities, timestamps, and verification methods compliant with ESIGN and eIDAS standards. Download as a standalone A4 certificate PDF, append it as the final verified page of your document, or export the audit log in JSON.
获得最佳结果的提示
开始之前请花一点时间阅读选项，并先用一个小例子试用工具。一切都在您设备的浏览器中运行；您输入或添加的任何内容都不会被上传，关闭标签页会清除所有内容。如果看起来不对，请刷新页面重试，或使用本页的报告链接告诉我们出了什么问题。如果结果仍然看起来不对，请每次只更改一个值，看看哪个输入影响最大。如果您还会再用，请收藏此页。
要点
- 分类: 编辑与签名
- 在浏览器中运行，无需注册，无需上传。
- 您输入的信息保留在设备上。
- 提供多种语言。
- 内容最后审核日期:
常见问题
What is a document audit trail certificate?
It is a legal record that records the cryptographic fingerprint (SHA-256 hash), signing timestamp, and signer identities of a document, proving it has not been modified after signing.
Are my contracts or confidential files sent to a server?
No. The entire cryptographic checksum calculation and PDF certificate rendering occur locally in your browser using the Web Crypto API. Your documents remain strictly confidential.
Can I append the certificate to my signed PDF?
Yes. With one click, the tool merges the official Certificate of Completion as the final page of your PDF agreement.
Does this comply with ESIGN and eIDAS standards?
Yes. The cryptographic hash and timestamped signer record meet the technical requirements for tamper-evident digital audit logs.