Question 1

How does this file transfer work? Does it use a server?

Accepted Answer

No, it doesn't use any middleman server. This tool is built on WebRTC technology, which establishes a direct Peer-to-Peer (P2P) encrypted data channel between your two devices. Files and text are sent directly across your local network from one device to the other.

Question 2

How fast is the transfer? Are there file size limits?

Accepted Answer

Since devices connect directly over your local network, the transfer speed depends entirely on your Wi-Fi router's bandwidth (often reaching tens or hundreds of MB/s) and won't consume your mobile data. Currently, you can share text, clipboard content, and files of any size. Theoretically, there is no size limit.

Question 3

Is the transferred content secure? Can anyone else see it?

Accepted Answer

It is absolutely secure. The WebRTC protocol strictly enforces end-to-end encryption (DTLS/SRTP) by default. Because your files are never uploaded to any cloud server, it is physically impossible for any third party (including us) to intercept, view, or save your data. Your privacy is fully protected.

Question 4

Why does the connection sometimes fail after entering the code?

Accepted Answer

WebRTC direct connections require both devices to be on a relatively open network environment (like the same home Wi-Fi). If you are on a highly restrictive corporate/campus network or certain mobile cellular networks (like symmetric NAT firewalls), the direct connection might be blocked. In this case, try switching both devices to a standard home Wi-Fi or a personal mobile hotspot.

Cross-Device Transfer

Frequently Asked Questions