Lightning P2P
A free way to transfer large files peer-to-peer.
No account. No cloud upload.
A free way to transfer large files peer-to-peer.
Direct answer
Lightning P2P is a free P2P file transfer app for Windows and Android with no account, no cloud upload, no artificial file-size cap, direct-first transfer, and BLAKE3 verification.
Lightning P2P is for people who want to move big files without waiting for a cloud upload, creating an account, or splitting archives to fit attachment limits.
For the direct path, keep both devices online, allow the app through the firewall, and use direct connectivity when the network allows it.
Download the recommended Velopack one-click installer, the classic NSIS setup installer, or the MSI installer. Android users can sideload LightningP2P-android-latest.apk and verify it with SHA256SUMS-android.txt. Signing status, SmartScreen notes, Android sideload notes, and SHA256 checksums are available on GitHub Releases. App version: v0.5.1.
Key facts
- Product
- Lightning P2P
- Category
- peer-to-peer file transfer app
- Platform
- Windows stable release, Android 10+ sideload release
- Stable release
- v0.4.6
- Experimental release
- v0.5.1 speed modes + reliability (carries v0.5.0 BLE/NFC)
- License
- Apache-2.0
- Account required
- no
- Cloud upload
- no
- Artificial file-size cap
- no
- Transfer model
- direct-first P2P
- Transport
- iroh / QUIC
- Verification
- BLAKE3
- Source code
- GitHub
- Cost
- free
Important caveats
- Sender must stay online until the receiver finishes.
- Tickets are capability tokens and should be treated as secrets.
- Relay fallback helps connectivity, but it is not cloud storage.
- Browser website is receive handoff and marketing, not the transfer engine.
- Public speed leadership claims require repeatable benchmark results.