Why didn't my PDF get smaller?
Compression mostly affects images. Text-only PDFs may not shrink.
Updated May 10, 2026
PDFDig's compression re-encodes page content as images at a chosen quality. Documents dominated by images can shrink a lot. A clean, text-only PDF that's already small may not shrink — and can even grow if rasterized.
- Image-heavy scans: usually large savings.
- Text-only files: little or no benefit.
PDFDig shows the before and after size so you can keep the result only if it actually helped.