How to Improve Acrobat Performance When Converting Many JPG Files to PDF
Question details
The user is experiencing severe slowdowns in Adobe Acrobat when attempting to convert and apply OCR to hundreds of JPG image files into PDF format.
- Product
- Adobe Acrobat
- Device & OS
- macOS
- Scenario
- Batch converting and performing OCR on a large number of high-resolution JPG files to create PDF documents.
- Observed behavior
- Acrobat processes the files very slowly or becomes unresponsive during the conversion and OCR process, especially after a macOS or Acrobat software update.
Before optimizing your Acrobat preferences, make sure your macOS system and Adobe Acrobat software are updated to the latest versions, as outdated software can cause severe performance drops during heavy OCR processing.
Optimize Acrobat Preferences and Batch Workflow
Modify your Acrobat settings to disable resource-heavy background processes and handle files more efficiently.
Acrobat runs multiple background services such as file synchronization and thumbnail generation. Disabling these during large batch operations frees up system memory and processing power.
Open Adobe Acrobat and navigate to Acrobat > Preferences from the top menu bar on your macOS.
Locate settings for file synchronization services and automatic embedding of thumbnail page views, and turn them off.
Find the 'Fast Web View' setting in the preferences and disable it, as it forces Acrobat to restructure the document while saving.
Ensure all JPG files are saved directly to a local hard drive folder rather than a network drive or cloud-synced folder (like iCloud or OneDrive).
Select smaller groups of JPG files (e.g., 20-50 at a time) to convert and run OCR, rather than processing hundreds simultaneously.
Temporarily Adjust Security Settings
Some enhanced security features can restrict or slow down batch processing, but should only be altered with caution for troubleshooting.
Use WPS Office to Quickly Convert Multiple JPGs to PDF
If Acrobat remains slow, WPS Office provides a lightweight, highly optimized 'Picture to PDF' tool that can easily batch process images and extract text using built-in OCR without freezing your system.
- 1. Open WPS Office: Launch WPS Office on your computer and navigate to the 'Tools' tab.
- 2. Select Picture to PDF: Click on the 'Picture to PDF' feature from the available PDF tools.
- 3. Import JPG Files: Click 'Add Pictures' and select the batch of JPG files you wish to convert.
- 4. Configure Output: Adjust the page layout and choose whether to merge the images into a single PDF or save them as individual files.
- 5. Convert and Save: Click 'Convert' to instantly process your files and export the new PDF document to your local drive.
Frequently Asked Questions
Does image resolution affect PDF conversion speed?
Yes, high-resolution JPG files require significantly more memory and processing power to convert and run OCR. Compressing or resizing images slightly before conversion can drastically improve software performance.
Why does Acrobat freeze when running OCR on large batches?
Acrobat may freeze if it runs out of memory, or if background processes like thumbnail generation and cloud synchronization are trying to update hundreds of files simultaneously. Processing smaller batches typically resolves this.
Can cloud storage cause PDF conversion to slow down?
Yes. If your files are located in a folder synced by iCloud, OneDrive, or Google Drive, Acrobat may pause conversion while the cloud service attempts to upload intermediate files. Always convert files from a local, un-synced directory.
Is disabling Protected Mode in Acrobat safe?
Disabling Protected Mode removes a layer of security that prevents potentially malicious files from executing code on your computer. It should only be done temporarily for troubleshooting and turned back on afterward.
