Seal a Parcel
Choose a file. We will encrypt it on this page using AES-256-GCM with a freshly generated key. The key never leaves your machine until you choose to share it.
Drop a file here, or
No file selected.
Parcel Sealed
Two pieces are required to read the contents. Send them by separate channels.
The recipient pastes the key on the Open a Parcel tab along with the file.
Open a Parcel
Drop the encrypted parcel below and provide the opening key (and passphrase, if one was set).
Drop the parcel here, or
No parcel selected.
Parcel Opened
How It Works
What this is
Burn Notice encrypts files entirely in your browser using AES-256 in Galois/Counter mode — the same primitive used in TLS. A fresh 256-bit key is generated for every parcel via the browser's cryptographically secure random source. If you set a passphrase, the encryption key is additionally derived through 250,000 rounds of PBKDF2 with SHA-256.
What it isn't
It is not a hosted service and not a one-shot delivery system. The "burn" is in the discipline: send the parcel and the key by different channels, agree to delete both after reading, and don't reuse keys. We can only sharpen the tools — the tradecraft is yours.
Why two channels
If both the parcel and the key travel together, an interloper who sees one sees both. Send the file by email, the key by signal flag — or by the ordinary phone, or scrawled on the back of a Metro ticket — anything but the same envelope.
What happens to your data
Nothing. There is no server. Open the page, work, close the tab. We don't see what you sealed, who you sealed it for, or that you were here at all.