Encrypted before upload
Messages and files are encrypted on your device before they leave it. The server can deliver the ciphertext, but cannot decrypt your content.
End-to-end encryptedSend files and text
Send files and text
between your own devices — privately.
file-sharer is a private, end-to-end encrypted space for your phone, laptop, and tablet. No account required: your content is encrypted on your device before upload, and the server never receives it in readable form.
- No account
- Up to 50 MB per file
- Offline-ready
Your private space for every device
Create a private space or link this device to one you already have. No account or server password needed.
Why file-sharer
Your content stays yours
Messages and files are encrypted on your devices before they leave them. The server can deliver ciphertext, but cannot decrypt it.
No account required
No email or server password. Optionally protect this device with a passphrase, PIN, or passkey.
One private space, every device
Keep your phone, laptop, and tablet connected through one private space you control.
Pair with a QR code
Link a new device through an out-of-band QR flow that securely transfers access to it.
Files up to 50 MB
Send documents, images, or archives. Delivered content is removed from the server automatically.
Local history & offline queue
Your history stays on your devices. Messages and selected files can wait locally, but uploading and delivery require a connection.
How it works
Up and running in three steps
- Step 01
Create a private space
Start on any device without an account, email, or server password.
- Step 02
Link your devices
Scan a QR code to add your phone, laptop, or tablet to the same private space.
- Step 03
Send without waiting
Send text and files when connected; if a recipient is offline, encrypted content waits for it.
Security model
Built so the server cannot decrypt your content
Messages, files, and file metadata are encrypted on your devices. The service receives ciphertext, public keys, authentication data, and delivery metadata — but not readable content or private device keys.
- Content encryption (AES-GCM 256)
- A local group key encrypts messages, files, and file metadata. Keys rotate when membership changes.
- Device identity (ECDH P-256)
- Each device creates its own P-256 key pair. Private keys are never sent to the server; an optional encrypted recovery file can restore a device.
- Encrypted device pairing
- A QR code binds the new device's public key to the pairing. The shared group key is sent only inside an encrypted package.
- Temporary server storage
- Delivered messages and files are purged when active recipients acknowledge them; a scheduled cleanup removes anything older than 24 hours.
FAQ
Questions, answered
Is file-sharer end-to-end encrypted?
Yes. Messages, files, and file metadata are encrypted on your device with AES-GCM before upload. The server receives ciphertext and cannot decrypt the content.
Do I need an account?
No account, email, or server password is required. You can optionally protect this device with a passphrase, PIN, or passkey.
Can the server read my messages or files?
It cannot decrypt your content. It does receive ciphertext and the protocol metadata needed to authenticate requests and deliver messages.
What is the maximum file size?
You can share files up to 50 MB. Delivered content is purged when active recipients acknowledge it; anything left over is cleaned up within 24 hours.
Does it work offline?
Partly. The installed PWA keeps local history available and can save outgoing messages or selected files locally, but nothing is uploaded or delivered until you reconnect.
How do I add another device?
On the new device, choose to link an existing space and show its QR code. Scan it from a linked device; the shared group key is transferred in an encrypted pairing package.
Where are the encryption keys kept?
Private device keys are generated locally and never sent to the server. The shared group key is transferred only to linked devices through encrypted pairing and key-rotation packages. An optional encrypted recovery file can carry a copy for restoring a device.