PDF Audit Trail & Digital Verification Certificate Generator
Create legal-grade digital certificates of completion with SHA-256 cryptographic hashes and verification QR codes.
Runs in your browser. Your files never leave your device. See how to check
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How to do it
- 1Choose your settings
Fill in the details or pick the options you need.
- 2See the result
The preview updates right away as you change things.
- 3Download or save it
Save the result to your device. Nothing is sent to or stored on a server.
About this tool
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.
Tips for best results
Take a moment to read the options before you start, and try the tool with a small sample first. Everything runs in your browser on your own device, so nothing you type or add is uploaded, and closing the tab clears it. If something does not look right, reload the page and try again, or use the report link on this page to tell us what went wrong so we can fix it. If a result still looks wrong, change one value at a time to see which box matters most. Bookmark this page if you will need the tool again.
Quick facts
- Category: Edit & Sign
- Works in your browser, no sign-up, no upload.
- Your input stays on your device.
- Available in many languages.
- Content last reviewed:
Frequently asked questions
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.