PDF size often comes from embedded images, fonts, and other resources. The best reduction method depends on whether the document needs searchable text, selectable content, or high-resolution graphics.
Check What the Document Contains
Scanned pages are usually stored as images. A PDF created from text may contain selectable characters, fonts, and vector graphics. Reducing image resolution can save space in a scan, while optimizing embedded resources may suit a text document better.
Know the Tradeoff of Rasterizing Pages
Some compression workflows render every page to an image and build a new PDF from those images. This can change the document: text may no longer be selectable or searchable, fine details may be lost, and accessibility information or interactive elements may not carry over.
Our PDF Compressor uses an image-based approach. Keep the original, then inspect every page at a readable zoom. Test search and text selection if those features matter, and compare the final file size before sharing.
For confidential documents, check the tool's processing behavior and your organization's requirements before using any service. Never overwrite the only copy of an important document.