What is reep.io? reep.io uses modern WebRTC technology to enable peer-to-peer file transfers between two browser. Peer-to-Peer file transfers (in your browser) With reep.io (reep = peer spelled backwards, duh) you can transfer files directly to another browser. You can transfer anything you want without storing the data on a server first. You can even stream video files or preview images directly. Privacy reep.