How to Compress PDFs Without Removing Accessibility Tags
Question details
The user wants to compress PDF files to reduce size without stripping the accessibility tags required for screen readers and document structure.
- Product
- PDF Editor
- Device & OS
- not provided
- Scenario
- Combining and compressing PDFs to reduce duplicate data and file size while maintaining compliance with accessibility standards.
- Observed behavior
- Certain PDF compression workflows or settings are inadvertently removing the structural tags needed for accessibility.
Before compressing your PDF, save a backup copy of the original tagged document. This ensures you can easily restore the accessibility tags if your compression software inadvertently removes them.
Verify Compression Options to Preserve Document Structure
Standard compression shouldn't remove tags, but aggressive optimization or specific software settings might strip them. Checking your workflow is the first step.
In most PDF editing software, simple file compression prioritizes reducing image resolution and removing duplicate fonts. However, advanced optimization settings might contain checkboxes designed to strip out metadata, user data, and document structure to save maximum space. Ensuring these specific options are disabled will protect your accessibility tags.
Open your PDF compression software and locate the advanced optimization or compression settings menu.
Look for options labeled 'Discard Objects', 'Discard User Data', or 'Remove Document Structure'. Ensure these specific options are unchecked.
Run a test compression on a copy of your file and use an accessibility checker to compare the tags before and after processing.
Compress and Manage PDFs Easily with WPS Office
WPS Office provides a comprehensive PDF toolkit that allows you to combine, edit, and compress PDF documents efficiently while preserving essential document formatting.
- 1. Open WPS PDF: Launch WPS Office and click on the 'PDF' tab to open the PDF editor.
- 2. Access the compression tool: Open the PDF file you wish to compress, navigate to the 'Tools' menu, and select 'Compress'.
- 3. Select compression level: Choose your desired compression level (e.g., HD, Normal, or Common) to dictate the final file size.
- 4. Apply compression: Click 'Compress' to process the document, then save the optimized file to your device.
Frequently Asked Questions
Why do my PDF accessibility tags disappear after compression?
This usually happens if your compression software is set to aggressively optimize the file by discarding user data, document structure, or metadata to save space. Adjusting your optimization settings to retain document structure will fix this.
How can I check if my PDF still has accessibility tags?
You can verify the tags by opening the Tags panel in your advanced PDF editor or by running a built-in Accessibility Checker to confirm the document structure is still intact after compression.
Does flattening a PDF remove accessibility tags?
Yes, flattening a PDF often removes interactive elements and structural tags, converting the document into a single unlayered image or standard text layer, which destroys accessibility. Avoid flattening if you need to keep tags.
