Compress and Optimize a Document

Nitro PDF Pro includes tools to remove unnecessary objects and compress images. Use these tools to reduce the file size of a PDF document.

Optimize a PDF file

Click File > Optimize PDF
Select one of the following options:
- Reduced Size
  Optimize the PDF file to the smallest possible size.
  Click Show Details to view the changes.
- Reduced Size and Print Ready
  Optimize the PDF file for a small size while maintaining print quality.
  Click Show Details to view the changes.
- Custom
  Click Show Details to configure the following options:
  - Resample images
    Select this option. Then select the required compression level
  - Interactive content
    Remove interactive elements that are not required
  - Document content
    Select additional content to remove and reduce file size
  - Remove bookmarks
    Remove bookmarks. Bookmarks are optional for viewing
  - Remove file attachments
    Remove attachments. Attachments can increase file size.
    Removing attachments does not change page content.
  - Remove embedded thumbnail images
    Remove thumbnail images used in the Pages pane.
    The application can generate thumbnails when needed.
  - Remove named destinations
    Remove links to internal document locations.
    Some documents do not require these links.
  - Remove unused objects
    Remove unused JavaScript or annotation objects.
  - Remove only invalid or unused links
    Remove links that are invalid or not used.
Click Optimize to apply the changes, or click Cancel to stop the process

Last updated: June 2026

Nitro PDF Pro for Windows