Privacy policy

Last updated 8 November 2026

PatternProof is operated by Ettix. This policy explains what happens to your information when you use the PatternProof website and checker.

Your PDF files stay on your device

PDFs are opened and analysed entirely inside your browser using a copy of PDF.js served from our own site. File contents, file names, page images, measurements and reports are never transmitted to our servers or to anyone else. Document scripts and forms inside your PDFs are not executed, and the checker makes no external requests on behalf of your files.

To let you resume after checkout, the checker saves your settings and a short summary of results (file names, sizes, a PDF fingerprint, measurements and margin results) in your browser’s local storage. The app restores those results for up to 48 hours. This never leaves your device, and you can remove it by dismissing the restore notice or clearing site data.

What our server receives

• Payments: when you buy a Batch Pass you are redirected to Square or PayPal, who process your payment under their own privacy policies. We receive the order status and amount from them to confirm the payment. We do not receive or store your card details.
• Pass cookie: a signed, HTTP-only cookie (patternproof_pass) records that this browser has an active pass and when it expires. It contains no personal information.
• Checkout recovery: a signed ticket for an unfinished checkout is kept in your browser’s local storage so payment can be confirmed if you return in another tab.
• Anonymous counts: we count free report exports, started checkouts and confirmed purchases, each with a campaign source chosen from a short fixed list (for example “instagram” or “direct”) derived from utm_ link parameters. We do not store IP addresses, file names, URLs, referrers or any identifier that could identify you. Payment order IDs are stored only as one-way keyed hashes.
• Server logs: our hosting may keep technical logs (such as IP address and request time) for security and abuse prevention.

We do not use advertising trackers, third-party analytics or tracking pixels.

Contact

Ettix — Contact Ettix