Relay turns cross-device file transfer into a parcel-locker flow. Choose one or more files, then share a short pickup code, link, or QR code. The recipient opens Relay in any modern browser—no app or account required. Files stream directly over WebRTC when possible and are never stored by Relay. If a direct connection cannot be established, an encrypted relay can carry the stream. Relay is free and open source, and works across Windows, macOS, iPhone, and Android.
I built Relay after repeatedly running into the same small problem: moving a large original file between Windows and Apple devices should not require installing an app, signing in, or uploading it to cloud storage first.
The idea is closer to a parcel locker than a cloud drive. The sender keeps the page open, shares a short pickup code, link, or QR code, and the recipient collects the files directly. Nothing is compressed and Relay does not keep a copy.
I would especially value feedback on whether the pickup flow feels obvious, how well it works across your devices and networks, and whether the privacy explanation is clear enough.