SimpleX File Transfer

Drag & drop a file here

Choose file

Max 100 MB - SimpleX Chat app supports files up to 1 GB

Send files securely with end-to-end encryption — no accounts, no tracking.

Get SimpleX Chat — the most secure & private messenger

The file transfer you just used uses the same data routing protocol as SimpleX Chat. The app has end-to-end encrypted messaging, voice and video calls, groups, and sending files. No account. No phone. No email. No user profile IDs.

XFTP protocol: the most secure file transfer

No account required

Each file fragment uses a new random key. Data routers have no "users" or "files" - they transfer encrypted file fragments of fixed sizes.

Triple-encrypted in your browser

File encryption key is present only in the URL hash fragment - your browser never sends it to a server. There are 3 encryption layers: TLS transport, per-recipient encryption (unique ephemeral key per transfer), and file end-to-end encryption.

Independent data routers

When file is split to fragments, it is sent via network routers operated by independent parties. No operator can see the actual file size or name. Even if a router is compromised, it can only see encrypted fragments of fixed size. File fragments are cached by network routers for approximately 48 hours.

Read the XFTP protocol specification →