Send any file.
Anywhere. Privately.
AlterSend pairs your devices with a QR scan. Files travel directly between them — encrypted, peer-to-peer. No accounts. No size limits. No middlemen.
Three steps.
That's it.
Pair devices
Scan a QR code or paste a join code. No accounts, no sign-up.
Encrypted channel opens
Your devices find each other on the peer-to-peer network and open an end-to-end encrypted channel.
Files transfer
Drop files in. They travel device-to-device, end-to-end encrypted, without touching any server.
Others get close.
None go all the way.
Every tool people actually use has at least one dealbreaker. AlterSend was built to have none.
Built for transfers.
Not uploads.
Direct, peer-to-peer
Your files never touch our servers because there are none. End-to-end encrypted with ChaCha20-Poly1305.
- End-to-end encrypted
- Files never touch our servers
- New encryption keys per session
No size limits
1 KB or 200 GB — same flow. You're not uploading, you're transferring.
No accounts
Open. Pair. Send. Nothing to sign up for, nothing to leak.
Cross-platform
Mac, Windows, Linux, iOS, Android — one shared protocol.
Open source
Apache-2.0 licensed. Audit every line, fork it, or run your own.