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  1. 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.

  2. Add passwords to PDFs - Adobe Inc.

    Dec 5, 2025 · Learn how to add password security to PDFs in Adobe Acrobat to restrict opening, editing, printing, or copying of documents.

  3. How to password protect a PDF on a PC | Adobe Acrobat

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

  4. Password protect a PDF - 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 content.

  5. Password protected PDFs and PDF security | Adobe Acrobat

    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 …

  6. 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.

  7. Password Protect a PDF for Free | Protect your PDF Online | Adobe

    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.

  8. 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.

  9. Protect PDFs - Adobe Inc.

    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 remain private and …

  10. Protect a PDF File with a Password | Adobe Acrobat

    Nov 10, 2025 · Learn how to add a password to your PDF to protect others from opening or editing the PDF file. Protecting your PDF files prevents unauthorized access, protects sensitive information, …