Certify PDF
Stamp any PDF with a SHA-256 fingerprint and a scannable QR code — a tamper-evident certificate anyone can independently verify.
Upload a PDF to certify
We'll compute a SHA-256 fingerprint and stamp a QR-coded certificate page.
PDF Certify
Appends a tamper-evident certificate page containing a SHA-256 fingerprint and a scannable QR code — a self-serve way to prove a document hasn't been altered since it was fingerprinted.
Certify PDF: Private, Browser-Based Processing
Learn how the Certify PDF tool securely compiles and edits your files directly inside your browser sandbox.
🔒Zero Server Uploads (100% Private)
Your privacy is our highest priority. Unlike conventional online PDF converters that upload your sensitive documents to remote cloud storage servers, the Certify PDF tool operates entirely inside your web browser's local sandbox. Your files are never transmitted across the network, ensuring absolute confidentiality for personal, legal, and financial documents.
⚡Powered by Local WebAssembly
We leverage cutting-edge browser technologies, including WebAssembly (Wasm) compiles of professional document engines and HTML5 canvas APIs, to power the Certify PDF tool directly on your device's CPU. This local execution model provides instant processing speeds while bypassing slow internet upload and download queues.
✨No Limits, No Watermarks, No Sign-Up
The Certify PDF tool comes with fully unrestricted access — no file size caps, daily usage limits, page count restrictions, or registration prompts. Every output is pristine quality without added branding or watermarks, making it ideal for both personal and professional workflows.
🔌Full Offline Capabilities
Since the Certify PDF tool renders and processes everything client-side within your browser sandbox, it does not require an active internet connection to function. Once the page is loaded, you can safely disconnect your device and keep working offline.
About the Certify PDF Tool
Create a tamper-evident record for an important PDF without uploading it to a third party. iCreatePDF calculates a SHA-256 fingerprint and adds a QR-enabled certificate, making it easy to identify whether a later copy is the same file you certified.
How to Certify PDF
- 1
Add the PDF
Choose the document you want to fingerprint. It stays in your browser.
- 2
Create the certificate
Generate a SHA-256 fingerprint and the accompanying QR-enabled proof.
- 3
Save the certified copy
Download the marked PDF and retain the fingerprint for future checks.
- 4
Verify a later copy
Compare a file against its fingerprint to check whether its contents have changed.
Common Use Cases
- Document a final contract before sharing it
- Create an integrity record for a report or certificate
- Check whether a received PDF matches an approved copy
- Keep a verifiable record without sending a file to a server
Frequently Asked Questions
What does a SHA-256 PDF fingerprint do?
It creates a unique cryptographic digest for the exact file contents. If the file changes, its fingerprint changes too.
Does certification make a legal notarization?
No. It provides a tamper-evident integrity record; it does not replace a legal notary or qualified digital signature.
Is the PDF uploaded?
No. Fingerprinting and certificate creation run locally in your browser.