Pt · SECURE
Password-protect a PDF
Lock private documents with strong AES-256 encryption.
- AES-256 encryption
- Password never sent anywhere
- Free and unlimited
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Click on the page to place your text.
How to password-protect a PDF
- Step 1Add your PDFDrop it on the page or tap to choose. It opens in your browser, not on a server.
- Step 2Set a passwordSet the options for how you want to protect it. You see a preview before anything changes.
- Step 3DownloadYour new file is ready in seconds. Close the tab and every trace is gone.
Questions
Is it free to protect a PDF?
Yes. This tool is free and unlimited, with no sign-up and no watermark.
Do you upload my files?
No. The tool runs inside your browser using WebAssembly. Your file never leaves your device, and it still works with Wi-Fi turned off.
Does it work on my phone?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows, Mac and Linux.