Send a file that can only be opened once.

Encrypted on your device. Never uploaded. The key is released exactly once, then burned — so once it's opened, it's opened.

Send a file → Received a file?

How it works

Three steps. No account required for the person on the other end.

1. Lock it on your device

Your browser encrypts the file locally and generates a one-time key. The file itself never leaves your machine unencrypted — or at all.

2. Send it your way

Email the locked file, drop it in a shared drive, hand it over on a USB stick. Share the link and PIN separately — or let us deliver them for you.

3. Key burns on open

The recipient enters the PIN, the key is released once, and it's destroyed immediately — atomically, so it can never be claimed twice.

Why it's different

No security theater — just a small, honest guarantee.

Your file never touches our servers

We hold a key, never the file. Even we can't read it — because we never have it, at any point.

One open, enforced

The key release is atomic — claimed exactly once. Five wrong PIN attempts and the file locks out for good.

No account for recipients

Whoever opens the file just needs the link and the PIN. No sign-up, no app to install.

Works with any file type

Documents, photos, archives, anything. We never inspect the contents, so we never need to know what it is.

What we don't claim: once a recipient opens a file, they have it — like any file, they can copy or forward it from that point on. Our guarantee is narrower and more honest: the key is released exactly once, and after that, nothing is recoverable from us. We never held the file, so there's nothing left on our side to protect or leak.

Pricing

Opening a file is always free. Senders pay a small monthly fee to lock and deliver.

Starter
£2.99 / month
10 files / month · email delivery included
  • Any file type
  • Client-side encryption
  • One-time open, burn-on-read
Unlimited
£29.99 / month
Unlimited files · priority support
  • Everything in Plus
  • Priority support