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Scan the QR code with the phone camera, or open this page on it and type the code.
Fast file transfer between the phone (iPhone or Android) and the PC. Nothing is installed on the phone.
Both devices on the same network (the PC can be on a cable). Nothing to install. The pairing uses the free public PeerJS server; the files go directly between the two devices and are not uploaded. Public networks may isolate the devices.