Privacy Policy
Last updated: August 28, 2026
Catalog files stay in your browser
CatalogDiff lets you select a spreadsheet and a PDF catalog for comparison. File parsing, text extraction, comparison, and issue-report generation happen locally in your web browser. CatalogDiff does not upload your selected spreadsheet, PDF, or extracted catalog contents to its server.
No CatalogDiff account
You can use the free checker without creating an account. Paid plans use a license key instead of a CatalogDiff username and password.
Paid-plan activation
If you activate a paid plan, CatalogDiff sends the license key, the email address you used at checkout, and a browser-instance label to Lemon Squeezy to confirm that the subscription is valid. The license key, instance identifier, plan, and validation timestamp are then stored in your browser's local storage so the site can remember your access on that browser. You can remove that local license from the Pricing section at any time.
Payments
Checkout, card processing, subscription billing, taxes, receipts, and payment records are handled by Lemon Squeezy as Merchant of Record. CatalogDiff does not receive or store your full card details. Lemon Squeezy's own privacy terms apply to information you provide during checkout.
Analytics and infrastructure
CatalogDiff does not include an analytics SDK in this launch version. Infrastructure and content-delivery providers may receive ordinary network metadata such as IP address, browser type, and request timestamps when they serve the website or third-party JavaScript libraries.
Local working data
Selected file data exists only in the active browser tab while you use the checker. Closing or refreshing the tab clears that working state. Downloaded issue reports are created locally on your device.
Third-party libraries
The website loads browser libraries used to read Excel files and PDFs from public content-delivery networks. CatalogDiff does not send your selected catalog files to those library providers.
Your responsibility
Do not use the service with material you are not authorized to process. CatalogDiff is a preflight aid, not a substitute for human approval of final pricing or printed material.