Password protect PDF and encrypt a PDF for free | Acrobat - Adobe
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.
How to encrypt a PDF file for email | Adobe Acrobat
Discover how to encrypt a PDF file to keep sensitive information secure via email. Our guide provides easy steps and helpful tips for protecting PDFs.
Secure your PDFs for free with password protection - Adobe
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 …
Password Protect a PDF for Free - Adobe
Use the free online PDF password protection tool from Adobe Acrobat to keep your files secure. Simply click ‘ Add a Password ’ to encrypt your PDF and restrict access to only those you …
Password protected PDFs and PDF security | Adobe Acrobat
If you’re working with sensitive information, you have to protect it. Learn how to easily encrypt with password and apply permissions to PDF files to prevent copying, changing, or printing your …
Add passwords to PDFs - Adobe Inc.
Dec 5, 2025 · Select All tools > Protect a PDF. In the left pane, select Protect with password. In the dialog box that opens, select if you want to set the password for Viewing or Editing. …
免費以密碼保護加密 PDF | 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。
How to password protect a PDF on a PC | Adobe Acrobat
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.
How to password protect a PDF | Adobe Acrobat
We’ll show you how to password protect a PDF for free and restrict certain features, such as printing and editing, in Adobe Acrobat.
How to secure a PDF with a password | Adobe Acrobat
Learn how to secure a PDF file. Secure your sensitive documents and protect PDFs with passwords to ensure only authorized users can access them.