Password-protect any file.
Lock a document, photo, or backup so only someone with the password can open it. Everything happens on your device.
Runs locally. Your file is never uploaded anywhere. Locking and unlocking happens entirely inside your browser using your own computer's resources.
Working with large files? Processing happens entirely on your machine, so large files take time — and your browser may appear frozen while it works. That is normal. If your browser shows a "Wait" or "Stop page" dialog, click Wait and leave it alone. The save dialog will appear on its own when ready.
Choose a strong password. Anyone with it can unlock this file.
What can you use this for?
- Protect a backup before uploading to cloud storage
- Send a sensitive document over email safely
- Lock files on a USB drive you might lose
- Protect tax returns, contracts, or medical records
- Share a file with one trusted person securely
- Store private photos without cloud exposure
Your file. Your password. Your machine.
No password, no access
The locked file is completely unreadable without the correct password. There is no recovery — keep your password safe.
Original file preserved
Locking creates a new .pte file alongside your original. Your original is not modified. Unlocking restores the exact original filename and type.
Any size, handled automatically
Small files process instantly. Large files are handled in pieces automatically — no settings to adjust, no upload required.