Encrypt your PDF with a strong password to prevent unauthorized access.
Select PDF to Protect
or drop your file here
Uploading a document to encrypt it defeats the purpose. This tool applies AES-256 encryption in your browser, so the file never leaves your computer.
Choose the document you want to secure from your local device.
Enter a strong password. This password will be required for anyone attempting to open or read the PDF.
Click encrypt. The browser will instantly secure your file using 256-bit encryption without uploading it to any server.
We use the latest PDF 2.0 encryption standards, making your document mathematically impossible to crack without the password.
Because the cryptography happens locally using WebAssembly, your file is never transmitted over the internet.
No! The encryption happens entirely in your web browser. We never see your document, your password, or your data.
Because we use strong AES-256 encryption and do not store copies of your files, the document cannot be recovered if you lose the password. Please keep it safe.
Password-protecting a PDF before emailing it is smart. Using an online tool to do it is not, because that means uploading the unencrypted file to someone else's server first. An unprotected financial statement or contract crossing the internet defeats the entire point.
This tool runs AES-256 encryption in your browser. The file locks on your own processor, and your password is never transmitted. You hold the only key.
It's also instant: no upload, no queue, no download of a protected copy. Encrypt, save, and share with confidence.