How to Change PDF Image Quality Settings in Adobe Acrobat Pro
Question details
The user wants to prevent image compression and change image quality settings when creating or editing PDFs in Adobe Acrobat Pro DC.

- Product
- Adobe Acrobat Pro DC
- Device & OS
- not provided
- Scenario
- Creating or editing high-quality PDF files where original image resolution needs to be preserved without aggressive downsampling.
- Observed behavior
- Images are automatically compressed or reduced in quality during PDF creation or editing due to default application or conversion settings.
Before adjusting your PDF settings, ensure you have access to the original high-resolution images or source documents, as increasing quality settings cannot restore lost resolution in PDFs that have already been compressed.
Adjust PDF Optimizer and Conversion Settings
Modify the built-in PDF presets and optimization settings in Adobe Acrobat to prevent image compression during editing and saving.
Acrobat preferences control basic application behaviors, but image compression heavily depends on how the PDF is optimized when saved. By customizing the PDF Optimizer, you can disable downsampling and retain maximum image quality.
Open your PDF in Acrobat Pro DC, navigate to 'File' > 'Save as Other', and select 'Optimized PDF' to open the optimization dialogue.
In the PDF Optimizer window, select the 'Images' panel from the left sidebar.
For Color, Grayscale, and Monochrome images, change the downsampling dropdown menus to 'Off'. Set the Compression dropdown to 'Retain existing' or choose 'ZIP' (lossless compression) to prevent quality loss.
Click 'OK' and save your document. You can also save these specific optimizer settings as a new custom preset for future use.

Change Export Settings in the Source Application
Adjust the PDF generation settings natively in the application used to create the document (such as Word, InDesign, or Photoshop) before it is converted to a PDF.
Edit and Export High-Quality PDFs Easily with WPS Office
WPS Office includes a comprehensive built-in PDF editor that allows you to create, edit, and export PDFs without losing image quality. It provides advanced control over file sizes and image compression, ensuring your documents look professional.
- 1. Open WPS Office: Launch WPS Office and open your source document or existing PDF file.
- 2. Access PDF Export: Navigate to the 'Menu' tab and select 'Export to PDF' to bring up the conversion options.
- 3. Adjust Quality Settings: Click on 'Advanced' or check the export parameters to select 'High Quality' and prevent unwanted image compression.
- 4. Save Your High-Resolution PDF: Click 'Export' to generate a crisp, high-resolution PDF file with all image details preserved.

Frequently Asked Questions
Why do my PDF images look blurry after conversion?
Blurry images are typically caused by automatic downsampling or compression settings applied during the PDF creation process. By default, many applications compress images to minimize the overall file size for easier sharing via email or web.
Can I restore image quality in a PDF that is already compressed?
No, once an image has been downsampled and compressed into a PDF, the discarded pixel data cannot be recovered. To get high-quality images, you must re-create or re-export the PDF from the original source file using higher quality settings.
Where can I find the 'High Quality Print' preset in Adobe Acrobat?
You can find this preset by going to Edit > Preferences > Convert to PDF, or by accessing the Adobe PDF printer preferences in your operating system and selecting 'High Quality Print' from the Default Settings drop-down menu.
How do I stop Acrobat from compressing images when I edit text?
Go to Edit > Preferences > General, and ensure that options related to optimizing for web or reducing file size automatically are disabled. Additionally, avoid using the 'Save as Reduced Size PDF' feature when saving your edits.




