Why Is My PDF Still Too Large After Compression? (And How to Fix It)

Published: 2026-02-07 | Read Time: 4 min read

Understand the root causes of stubborn PDF file sizes, including embedded 300 DPI raster layers, pre-compressed JPEG streams, and unflattened forms.

Frequently Asked Questions

Can vector drawings like CAD blueprints be compressed?

Standard image downsampling does not affect vector lines. For vector blueprints, simplify complex paths or convert pages to high-resolution raster images before re-compressing.