PairDrop: Open-Source Cross-Platform File Transfer Tool 93

PairDrop is an open-source cross-platform file transfer tool that enables devices to discover each other by opening it on another device, pairing devices, or joining a public room. If WebRTC is unavailable, traffic is routed through the server. It supports multiple languages including Chinese and English. Users can permanently pair devices (by entering a key or scanning a QR code), manage paired devices (such as setting auto-accept), use temporary public rooms (by entering a room ID or scanning a QR code), send text messages, and configure whether to show an edit dialog when sharing text.

Transfer Methods

✅ LAN Transfer: Within the same local network, devices can quickly transfer files peer-to-peer.

✅ Internet Transfer: Files can be transferred through temporary public rooms. Enter a room using a 5-letter code or QR code to transfer files with devices outside the local network.

✅ Paired Device Transfer: Pair devices using a 6-digit code or QR code. Once paired, even if not on the same local network, devices can find each other and transfer files through the shared key.

Features

✅ File Transfer: Supports sending images, documents, videos, and other file types, as well as sending text directly.

✅ Multi-Platform Support: No client installation required; simply open a browser on your device to use it.

✅ Privacy Protection: File transfers are end-to-end encrypted, with data sent directly between devices without passing through a server, ensuring privacy and security.

✅ Easy to Use: File transfers require confirmation from the receiver to begin, files are automatically downloaded after transfer, and multi-file batch transfers are supported.

✅ Other Features: Send files directly from the system right-click menu, iOS/Android share menu, or command-line interface.

Security

✅ LAN Transfer: Within the same local network, file transfers do not pass through any server.

✅ Internet Transfer: Even when transferred over the internet, files use encrypted channels that only the receiver can decrypt.

✅ Custom Deployment: Users can deploy PairDrop themselves and choose whether to enable the internet transfer feature, further enhancing security.

How to Use

✅ Visit the Official Website: Open your browser and go to the PairDrop official website.

✅ LAN Transfer: Within the same local network, devices automatically discover each other. Select the files to send on the sending device and click the name of the receiving device to start the transfer.

✅ QR Code Pairing: After opening the website on the sending device, a QR code and device name will be displayed. Open the website on the receiving device, click "Scan QR Code," use the camera to scan the QR code on the sending device, and once successful, files can be transferred.

✅ Temporary Public Room: Click "Join Public Room," and the system will generate a 5-letter code or QR code. Share the code or QR code with the other party. They can enter the code or scan the QR code to join the room and transfer files.

✅ Send Files: Select the files to send on the sending device. Multiple types are supported, and multiple files can be selected at once. PairDrop will automatically package them into a ZIP file for transfer.

✅ Receive Files: After the receiving device gets the transfer request, click "Accept," and the file will be automatically saved to the default download directory.

Use Cases

✅ Local File Sharing: Quickly transfer files within a home or office LAN.

✅ Cross-Network Transfer: Devices in different network environments can also share files using the internet transfer feature.

✅ Temporary File Sharing: When you need to temporarily share files with others, you can quickly connect through a public room.

Key Questions

✅ Question: What device discovery methods does PairDrop support?

Answer: Three methods — opening PairDrop on another device, pairing devices, and joining a public room to be discovered on other networks.

✅ Question: How to achieve permanent pairing of PairDrop devices?

Answer: Two methods — one is to enter the key of the current device or scan the QR code of the current device on another device, and the other is to enter the key of another device on the current device.

✅ Question: How does PairDrop handle traffic when WebRTC is unavailable?

Answer: It is routed through the server.