Protect PDF with a Password
without uploading it.
Add password protection to a PDF — instantly in your browser.
Drop an image, or click to browse
Drop a PDF or click to browse your files.
Enter and confirm a password.
Click "Add password" and download the protected file.
Why there's no upload step
Password-protecting a PDF usually means uploading it to a server, which defeats the point if the document is sensitive. This tool encrypts the file with AES-256 entirely in your browser — it never leaves your device.
Is my PDF uploaded anywhere?+
No. Encryption happens entirely in your browser.
How strong is the protection?+
It uses AES-256 encryption via a small, independently-published library — good enough to keep a casual reader out, but not a substitute for audited, industry-standard document-security software for highly sensitive files.
What if I forget the password?+
There's no recovery — keep the password somewhere safe, since it can't be reset.