Encrypt documents and split the key into multiple shares. No single person can unlock it alone — your pack holds the key.

Access a document

Enter the document ID you received. You'll be asked for your key on the next page.

How it works

Three simple steps to secure your documents with threshold encryption.

Create your secret document with our rich text editor. The content is encrypted client-side before it ever leaves your browser.

Choose how many keys to create and how many are needed to unlock. The encryption key is split using Shamir's Secret Sharing.

Distribute keys to your trusted key holders. When they gather enough shares, they decrypt the document together in the browser.

Every design decision puts your security first.

Your document is encrypted in the browser. The server never sees the unencrypted content or the full encryption key.

No single person can unlock the document. You choose how many key holders must cooperate — 3 of 5, 2 of 7, whatever you need.

Key holders receive a link — no sign-up, no app to install. When enough holders cooperate, the document unlocks instantly in the browser.

Furlock is fully open source under AGPL-3.0. Inspect the code, verify the crypto, trust but verify. No funny business.

No account needed. No tracking. Just encryption.