Password Protect PDF

Encrypt your PDF with a password

Maximum file size exceeded!

The file exceeds the maximum file size allowed. Please feel free to use our desktop version.

Maximum pages exceeded!

The file exceeds the maximum number of pages allowed. Please feel free to use our desktop version.

Maximum pages exceeded!

To increase the page limit per file to 2000 pages, please subscribe to HiPDF Pro.

Maximum file size exceeded!

To increase the size limit per file to 100MB, please subscribe to HiPDF Pro.

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  • Upload completed Upload failed Damaged file Invalid File Type! File protected

Enter a password to protect your document.

Note: this will make it impossible to open without entering the correct password.


Your PDF file is now protected with a password!

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File protected

This file is password protected, please submit the password so that we can open it.


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hipdf protect pdf online

How to password protect a PDF:

1. Import PDF file online to our Protect PDF tool.
2. Then wait for file extraction.
3. Enter a 6-20 characters password for your PDF file.
4. Click "Download" button to get the encrypted file.

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  • Privacy is protected

    As we have a cloud platform we use SSL encryption to ensure 100% online safety. Plus all the files uploaded on a platform are also deleted after processing.

  • Easy PDF Tool

    Our PDF tool is quick, easy and free. Put password on your PDF files instantly with our PDF password protection tool.

  • Runs on all Browsers

    Our browser-based HiPDF works for several platforms, whether you use Mac, Windows, or Linux. Moreover, the tools allow you to use it anywhere without any hassle.

  • Secured PDF API

    There is no other PDF conversion API you could use to meet your requirements. We offer top solutions to convert file formats as easily as possible.

  • Ideal PDF Tool

    HiPDF is the ideal solution for providing excellent PDF tools. Just select the file you want to protect and let us work!

  • Processing in the Cloud

    With our cloud-based platform you can convert any file online directly on the cloud and without any software installation.

Learn how to secure PDF step by step


Feature-rich PDF API for developers

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This feature can only be used by Premium users, you need to purchase HiPDF Pro

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