Nothing to install. Just a tab.
Sign in from any machine, work with your encrypted files, and close the browser with nothing left behind on it.
Your files, from any browser
Sign in at offkeep.com/app and manage your encrypted storage from any device — no app to install, nothing left behind when you close the tab.
No install required
Open a tab, sign in, and your files are there. Works on any browser, any OS — Chromebooks, library computers, whatever you have.
Drag-and-drop uploads
UploadLine files and entire folders straight from your browser. Progress is shown in real time; uploads resume automatically if your connection drops.
Instant downloads
Download individual files straight from the browser, with resumable transfers for large files. No native app needed.
Encrypted sharing
Generate a secure share link from any browser. The link is protected by a random token that only the link holder can use, and we store only a hash of it.
Your keys stay with you
Key material is generated and held in your browser and never sent to us. On a shared computer, sign out when you are done.
Full file manager
Create folders, rename, move, and delete files — the same operations available in the desktop apps, all without leaving your browser.
From tab open to files ready
Open the web app
Navigate to offkeep.com/app in any modern browser. No extension, plugin, or download required — the page is all you need.
Sign in securely
Your password is run through a memory-hard KDF (scrypt) locally to derive your encryption key. The key is never transmitted — only a login verifier reaches our servers.
Decrypt in the browser
Files are decrypted in the tab using open-source cryptographic code running in your browser. All cryptographic operations happen client-side, never on our servers.
Sign out when you are done
Signing out clears the session and the stored key material from this browser. Use a private window or sign out explicitly on shared devices.
Web Access FAQ
Is the web app as secure as the desktop app?
Yes. The web app uses the same end-to-end encryption model as the native clients. Encryption and decryption happen in your browser with open-source cryptographic code — your key is never sent to our servers.
Can I use it safely on a shared or public computer?
Yes. Sign out when you finish on a shared device — this clears the session and the stored key material from the browser. A private window adds an extra layer of separation.
Which browsers are supported?
Chrome, Firefox, Safari, and Edge in their recent versions. We test against the two most recent stable releases of each.
Can I preview files without downloading them?
Yes. Images and videos can be previewed inline after decryption, with thumbnails cached locally for speed.
Does the recipient of a shared link need an Offkeep account?
For shared collections, no — anyone with the link can open them. Shared folder links currently require the recipient to sign in to an Offkeep account.