Add PDF password protection to your file to protect sensitive content. When you encrypt a PDF, only people with the password can view the file content.

Sep 23, 2025 · Learn how to add password security to a PDF to restrict who can open, edit, print, or copy the document. Select All tools > Protect a PDF. In the left pane, select Protect with …

Add PDF password protection with the Adobe Acrobat online tool for free. By adding a password to your PDF file, you can limit access and only allow people with the password to view the file …

Use the online password protect PDF tool from Adobe Acrobat to keep your files secure. Simply add a password to your PDF to restrict access.

We’ll show you how to password protect a PDF for free and restrict certain features, such as printing and editing, in Adobe Acrobat.

Dec 10, 2024 · Learn how to add password security to a PDF. You can secure your PDF files by easily setting passwords through Acrobat on the web tool. This ensures your documents …

Sep 30, 2024 · Learn how to add a password to your PDF to protect others from opening or editing the file

How to password protect a PDF. Easily add a layer of security to your PDF files. Follow these six steps to password protect PDFs on your PC.

使用簡單易用的線上工具，以密碼保護 PDF。 透過值得信賴的 PDF 加密技術，保護敏感內容。

Jun 18, 2025 · Follow these steps to limit access to a PDF by setting passwords and by restricting certain features, such as printing and editing, in Adobe Acrobat.