PDF · Privacy
Password Protect PDF
Add AES-256 encryption entirely in your browser — your file and password never leave your device.
Every rival PDF password tool uploads your file to a server, encrypts it there, and sends it back. That means your document — contracts, financial records, personal information — travels over the internet at least twice. WeConvertIt does the opposite: qpdf (the industry-standard PDF engine) is compiled to WebAssembly and runs directly inside your browser. The encryption happens in your browser tab, the output lands in your downloads folder, and nothing ever hits our servers. Open DevTools → Network while you protect a PDF and see for yourself.
Related Tools
How to Use
- 1
Drop your PDF onto the upload area or click to browse. The file stays in your browser — nothing is uploaded.
- 2
Enter an open password. Recipients will need this to view the file. Optionally add a separate owner password for full administrative access.
- 3
Use the permission toggles to restrict printing, copying, or editing if needed.
- 4
Click "Lock with AES-256 — Protect PDF". The encryption runs in seconds using qpdf via WebAssembly.
- 5
Download the protected PDF and verify it requires the password when opened in any PDF viewer.
Frequently Asked Questions
Does WeConvertIt upload my PDF to encrypt it?
No. Encryption runs in your browser using qpdf compiled to WebAssembly. Your file and password are never transmitted to any server. You can confirm this in DevTools → Network — there will be no upload request.
What encryption standard is used?
AES-256, the same algorithm used by governments and financial institutions. The key is derived from your password and is never stored or transmitted.
What is the difference between the user password and the owner password?
The user password is required to open the PDF. The owner password allows full access regardless of permission restrictions — useful when you want to limit printing or copying while keeping a master override.
Can I restrict printing or copying?
Yes. Toggle the permission options before encrypting. These restrictions are embedded in the PDF and enforced by compliant viewers like Adobe Acrobat and Apple Preview.
What happens if I forget the password?
There is no recovery mechanism — AES-256 can't be reversed without the correct password. Store your password securely before sharing the protected file.