Quick Drop was built because every other file-sharing app is either too slow, forces you through cloud servers, has file size limits, or uses weak security.
Quick Drop is a fast, offline peer-to-peer file sharing application for Windows and Android. It transfers files directly over your local network, bypassing the internet entirely.
- No Size Limits: Transfer files or deep folder structures of any size.
- Fast Local Transfers: Maximize your hardware's throughput. Easily hit 150+ MB/s on standard Wi-Fi, with speeds scaling further on Gigabit Ethernet setups.
- Zero Configuration: Devices automatically discover each other on the local network. No accounts or pairing codes required.
- Cross-Platform: Send between any combination of Windows and Android devices.
- Secure: All transfers are end-to-end encrypted locally using XChaCha20-Poly1305 and X25519.
- Grab
QuickDrop.exefrom the Releases tab. - Run the installer.
- Open the app on devices connected to the same Wi-Fi (also supports devices connected over an Ethernet network, for example, office/college PCs).
- Start transferring!
(For a portable setup without installation, extract quick-drop-windows-x64-portable.zip and run the executable directly).
Quick Drop is built with Flutter and uses native network sockets for high-speed I/O.
- Discovery: UDP Broadcast to find local peers.
- Handshake: ECDH key exchange to establish trust.
- Key Derivation: HKDF to generate the session secret.
- Verification: Both screens display a 6-digit cryptographic PIN to prevent Man-In-The-Middle (MITM) attacks.
- Streaming: Files are chunked into 1MB blocks, encrypted on the fly, and streamed directly to disk.
Requirements: Flutter SDK (Windows), Visual Studio Build Tools.
flutter build windowsTo run multiple instances on the same PC for testing, enable UDP Port sharing:
flutter run -d windows --dart-define=QUICKDROP_ALLOW_SAME_PC=trueMIT License