Fast, secure, and private file transfer — right from your desktop.
A fast, minimal, and secure file transfer desktop app built with Electron. Send and receive files between devices over local networks with ease.
Get the latest release of FileTransfer for your OS:
- Windows: Download EXE
- macOS: Download DMG
In my work environment, sharing files was often slow and cumbersome — USB drives, email attachments and shared folders were inefficient, especially across different operating systems.
I wanted a fast, private, and simple way to share files with just one person, even over potentially unsecure networks.
This frustration inspired FileTransfer, a lightweight app for secure peer-to-peer file transfer on local networks.
- ⚡ Fast Transfer – optimized peer-to-peer data exchange
- 🔐 Secure – RSA encrypted connections between devices
- 🖥️ Cross-platform – works on Windows, macOS, and Linux
- 📁 Drag & Drop Support – just drag files to send
- 🌐 LAN Discovery – simply add friends on LAN
| Add Friend | Friend List | Accept File |
|---|---|---|
 |
 |
 |
FileTransfer ensures that all data is transmitted securely between devices using a hybrid encryption scheme.
-
Asymmetric Encryption (Public Key Cryptography) Each device generates a public/private key pair. The public key is shared with other devices, while the private key never leaves the local machine.
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Key Encryption Key (KEK) A KEK is used to encrypt the actual session key exchanged between peers.
-
Session Keys For each transfer, a unique symmetric key is generated to encrypt the file data itself. After the transfer is complete, the session key is destroyed.
-
End-to-End Encryption Only the sender and receiver can decrypt the transmitted file — no third party or relay server can read the data.
Contributions, bug reports, and suggestions are welcome! If you'd like to add features or fix issues, please open a Pull Request.
git checkout -b feature/your-feature
git commit -m "Add: new feature"
git push origin feature/your-feature| File / Directory | Description |
|---|---|
electron/main.js |
Main Electron entry point — creates the app window and initializes communication and dependencies. |
electron/preload/preload.js |
Exposes secure APIs to the renderer (Vue). |
electron/preload/passwordPreload.js |
Preload for the password entry window. |
electron/main/ipcs/index.js |
Centralized IPC handlers for communication between main and renderer processes. |
vue/main.js |
Entry point for the Vue UI. |
All Electron IPC communication is centralized in electron/ipcs/index.js.
It contains the main channels for sending and receiving messages between the main process and Vue renderer processes, including:
- File transfer commands
- Encryption key exchange
- Status updates for UI
- Password validation events
Files are inside electron/main/ipcs/
| File / Directory | Description |
|---|---|
electron/addFriend.js |
Handles friend discovery and peer connection setup. |
electron/fileTransfer.js |
Manages file transfer requests and progress updates. |
electron/app.js |
Handles general app operations (copy/paste, file selection, etc.). |
| File / Directory | Description |
|---|---|
electron/cryptoUtils.js |
Provides cryptographic utilities including RSA encryption/decryption, AES encryption/decryption with HMAC, and object/buffer conversions. |
electron/friendsManager.js |
Manages friends list: adding/removing friends, storing metadata, handling AES handshake state, and persisting encrypted friend data to disk. |
electron/keyManager.js |
Handles RSA key pair generation, passphrase validation, symmetric key generation, and key encryption/decryption utilities. |
electron/settingsManager.js |
Manages user settings (like download path) with AES-encrypted persistence and simple getters/setters. |
electron/tcpServer.js |
Implements TCP servers for RSA and AES encrypted communication with friends, including session management, handshake, and JSON stream handling. |
electron/udpServer.js |
Provides an event-driven UDP server for sending and receiving JSON messages, with automatic event emission based on message type. (Friend discovery) |
Class instances are intentionally omitted for clarity. This diagram focuses on the static structure of modules and their dependencies.
git clone https://github.com/maj-devs/fileTransfer.git
cd fileTransfer
npm install
cd vue
npm installInstance A:
TCP_PORT=41237 UDP_PORT=41200 UDP_PORT2=41202 INSTANCE=1 npm run devInstance B:
TCP_PORT=41235 UDP_PORT2=41200 UDP_PORT=41202 INSTANCE=2 npm run devnpm run build
