Fix Adobe Acrobat Preflight Not Reducing PDF Page Size
Question details
The user is attempting to reduce PDF page dimensions using the Preflight tool, but the fixup fails to decrease the size.
- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Using the Acrobat Preflight 'Scale Pages to Specified Size' fixup to shrink or scale down the dimensions of a PDF document.
- Observed behavior
- The Preflight fixup reports that it was successful and can increase page dimensions, but it entirely fails to reduce the page size regardless of using 'Fit from Outside' or 'Fit from Inside'.
Ensure you have saved a backup copy of your original PDF document before testing any Preflight fixups or applying permanent page size changes.
Update Adobe Acrobat and Test File Integrity
Software bugs in older Acrobat DC versions can prevent Preflight fixups from executing downward scaling properly. Updating often resolves these background processing errors.
The Preflight tool relies on precise PDF boundary box calculations. If a specific version of Acrobat has a bug with the 'Scale Pages to Specified Size' fixup, updating the software is the most direct fix.
Additionally, file-specific corruption or locked media boxes can prevent dimension reduction. Testing with a completely different PDF helps isolate whether the issue is with the application or the document itself.
Open a completely different PDF file and apply the same 'Scale Pages to Specified Size' Preflight fixup to see if the issue is isolated to a single document.
In Adobe Acrobat, navigate to the top menu bar, click on 'Help', and select 'Check for Updates'.
Follow the on-screen prompts to install the latest Acrobat DC patches. Once completed, restart your computer and try the fixup again.
Use the Print to PDF Workaround for Page Resizing
If the Preflight fixup continues to fail, printing the document to a new PDF with scaled print settings acts as a reliable alternative to force a page size reduction.
Resize PDF Pages Easily with WPS PDF
Skip the complex Preflight configurations and troubleshooting. WPS PDF provides an intuitive, user-friendly way to adjust, scale, and resize PDF pages without the underlying scaling bugs found in heavier software.
- 1. Open the PDF: Download and launch WPS Office, then open your target document in the WPS PDF editor.
- 2. Access the Print Dialog: Click the Print icon in the top toolbar or press Ctrl+P to open the printing interface.
- 3. Select Virtual PDF Printer: Choose 'WPS PDF' or 'Export to PDF' as your selected printer.
- 4. Scale and Save: Adjust the scale percentage or choose a smaller page size in Page Setup, then click Print to generate your perfectly resized PDF.
Frequently Asked Questions
Why does Acrobat Preflight increase page size but not reduce it?
This occurs either due to a known bug in specific builds of Adobe Acrobat DC or because the original document has locked boundary constraints (like the MediaBox or CropBox) that prevent downward scaling, while upward expansion is unrestricted.
What is the difference between 'Fit from Inside' and 'Fit from Outside' in Preflight?
'Fit from Inside' scales the page contents to fit entirely within the specified boundaries without clipping, while 'Fit from Outside' scales the page so that it fills the entire specified dimension, which may result in some content bleeding off the edges if aspect ratios differ.
Does cropping a PDF reduce its actual file size or page dimensions?
Cropping a PDF reduces the visible page dimensions (CropBox), but it does not delete the hidden content or necessarily reduce the file size in megabytes. To permanently reduce both, you must either use a Preflight fixup or print the file to a new PDF.
