Two compression methods
Choose Safe when preservation matters
Safe compression keeps the PDF structure and cleans up its storage. Strong compression rebuilds pages as images, which can work well for scans but removes interactive document features.
Before you start
- Safe compression may have little effect or make an already optimized PDF slightly larger.
- Strong compression does not preserve searchable text, links, bookmarks, annotations, forms, layers, or attachments.
- Encrypted and digitally signed PDFs are blocked. Open important results and verify them yourself.