Privacy Policy
At file.CoShareX, privacy is not an option—it is built directly into our core protocol. Learn how we safeguard your transfers.
1. End-to-End Encryption
All connections are negotiated directly between endpoints using WebRTC. DTLS encryption is mandated at the browser level, ensuring that data is encrypted in flight. Your file payloads cannot be read by intermediate routers, signaling nodes, or third-party ISPs.
2. Zero File Retention
We do not possess cloud databases, file caches, or intermediate storage disks. Files are split into packets, streamed locally, and assembled on the recipient device. Once the transfer is complete and the tab is closed, no footprint exists on the web.
3. Cryptographic Key Ownership
Cryptographic keys are generated inside the browser sandbox during the connection handshake. These keys are never shared with our signaling server. Decryption authority remains exclusively on the sender and receiver devices.
4. No Logging or Tracking
We do not deploy profiling cookies or tracking scripts. We only configure basic HTML5 local storage settings on the client side to preserve user interface options (like dark mode configurations).
5. Advertising & Cookies
file.cosharex.com is part of the CoShareX network, which uses Google AdSense for advertising. Google and its third-party advertising partners may use cookies, device identifiers, and similar technologies to serve advertisements on this subdomain based on your visits to our site and other pages on the internet.
Although our direct browser-to-browser file transfers are entirely encrypted and private, the external advertisements displayed on this domain require these standard advertising identifiers.
You can manage your ad personalization settings or opt out of targeted advertising by visiting Google's Ads Settings. To learn more about how Google processes information in connection with its partner network, please review Google's partner-sites page.
Our peer-to-peer transfer architecture is designed with data minimization principles in mind. Because files are transferred directly between browsers and are never stored, cached, or processed on our servers, this setup significantly reduces many of the security and privacy risks associated with centralized data storage.
Last Updated: August 2026.