Click the Select a file button above, or drag and drop a PDF into the drop zone. Enter a password, then retype it to confirm the password. Click Set password. Download the password-protected …

6 days ago · Learn how to add password security to PDFs in Adobe Acrobat to restrict opening, editing, printing, or copying of documents.

Click on the " Select a file " button above or drag and drop a PDF file into the drop zone. Enter a strong password and retype it to confirm. Click on " Set password ". Once done, you can …

Learn how to password protect PDF files using your PC. Adobe Acrobat makes keeping your information secure simple with our suite of features.

Upload a PDF by clicking the Select a file button or by dragging it into the drop zone. Enter a password, then retype to confirm it. Click Set password. Download the password-protected …

Navigate to the Acrobat online password protection for PDF page from any browser. Click the Select A File button or drag and drop a PDF into the drop zone. Create and enter a password, …

How to add passwords and permissions to PDF files: Open a file in Acrobat and choose “Tools” > “Protect.” Select whether you want to restrict editing with a password or encrypt the file with a …

Nov 10, 2025 · Learn how to add a password to your PDF to protect others from opening or editing the file

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

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。