10 May 2026 / 4 min read
How to Compress a PDF to a Target KB Size
Understand when PDF compression works well and how to choose a target size without making pages unreadable.
Know what can be compressed
Scanned PDFs and image-heavy documents usually shrink more than clean text-only PDFs.
If the PDF already contains optimized text and vector content, the file may not reduce much without lowering visible quality.
Use target size carefully
A target KB value is best effort. The tool can lower image quality and resolution, but it cannot always hit an exact size without making pages too soft.
Start with a balanced setting, then use a lower target only if the result is still readable.
Check readability
After compression, zoom in on signatures, IDs, stamps and small text before submitting the file.
If readability drops too much, choose a higher target size or reduce only unnecessary image-heavy pages.