Privacy Policy

Last-Modified: 2026-11-07

1. Information We Do Not Collect

We respect your privacy completely. When you compare lists or compute set operations on ListDiff.net:

• We do not require user registration, logins, or accounts.
• We do not collect names, email addresses, or any personal details.
• All lists, identifiers, domains, and CSV columns you paste into List A and List B are compared 100% locally inside your browser's memory using JavaScript Set and Map structures. Your data is never uploaded or transmitted to our servers.

2. Local Set Processing & Exports

Deduplication, sorting, Venn cardinality calculations, and TXT/CSV/JSON exports are generated entirely in your browser memory via Blob URLs.

3. Hosting, Infrastructure, and Security (Cloudflare)

ListDiff.net is hosted and delivered by Cloudflare. When you access the site, Cloudflare processes standard network traffic data (such as IP addresses and system configuration details) to route requests, cache static assets, and mitigate security threats like DDoS attacks. Data processed by Cloudflare is handled in accordance with the Cloudflare Privacy Policy.

4. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect operational or legal changes. Any modifications will be posted directly on this page with an updated last-modified date.