# AirLAN

> AirLAN is a browser-based, cross-platform file transfer tool at https://callaxis.org/. It transfers files directly between devices without requiring an app installation or account.

## Core facts

- Supported platforms: Android, iPhone and iPad, Windows, and Mac.
- Users open the same website in a modern browser on both devices.
- Nearby devices can discover each other automatically when they share the same network identity seen by the signaling service.
- An online device can also be added manually with its device ID.
- Files are sent through a peer-to-peer WebRTC DataChannel protected by DTLS.
- File bytes do not pass through or remain on the AirLAN signaling server.
- The Node.js server handles device discovery and WebRTC signaling only.
- AirLAN does not use a TURN relay. If a direct peer-to-peer connection is blocked by a firewall, NAT, or Wi-Fi client isolation, the transfer cannot proceed.
- Temporary DataChannel interruptions can resume from the last received file offset while both browser pages remain alive.

## Browser behavior

- Desktop Chromium browsers can write accepted files directly to a user-selected file or folder.
- Other browsers use supported browser storage or memory and then provide the received file for download.
- Browser suspension, page closure, or operating-system background restrictions can interrupt a transfer.

## Privacy

- No account is required.
- Device identity and previously accepted device history are stored in the browser.
- File contents are not uploaded to AirLAN's server.

## Canonical page

- Product: https://callaxis.org/
- Sitemap: https://callaxis.org/sitemap.xml