Password protect PDF

Protect your PDF files by adding a password to those documents with our safe and easy-to-use online tool.

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Aspose PDF Protect app to add password protection to PDF, PDF/A, PDF/UA documents. Add password protection online to PDF from Mac OS, Linux, Android, iOs and anywhere.
If you want to protect PDF document programmatically please check Aspose.PDF documentation.
How to

How to protect PDF file



  • 1

    ❓ How can I add password protection to PDF document?

    First, you need to add a file for lock: drag & drop your PDF file or click inside the white area for choose a file. Then click the 'PROTECT' button. When PDF document password protection is completed, you can download your result files.
  • 2

    ⏱️ How long does it take to PDF password protection?

    This Lock app works fast. You can add password protection to PDF in a few seconds.
  • 3

    🛡️ Is it safe to add password protection to PDF using free Aspose Lock?

    Of course! The download link of result files will be available instantly after lock. We delete uploaded files after 24 hours and the download links will stop working after this time period. No one has access to your files. File Lock is absolutely safe.
  • 4

    💻 Can I add password protection to PDF on Mac OS, Android or Linux?

    Our PDF Locker works online and does not require any software installation.
  • 5

    🌐 What browser should I use to protect PDF?

    You can use any modern browser to add password protection to PDF, for example, Google Chrome, Firefox, Opera, Safari.
Fast and Easy Lock

Fast and Easy Lock

Upload your password protected file, enter current password and click on "PROTECT NOW" button. You will get locked file as soon as the locking is performed.

Lock from Anywhere

Lock from Anywhere

It works from all platforms including Windows, Mac, Android and iOS. All files are processed on our servers. No plugin or software installation required for you.

Protection Quality

Protection Quality

Powered by Aspose.PDF . All files are processed using Aspose APIs, which are being used by many Fortune 100 companies across 114 countries.