Why did my PDF barely get smaller?
Understand small compression savings and choose a safe next step for scans, text, and signed PDFs.
A 2% reduction can be a correct result. Many PDFs are already compressed, and this browser tool leaves some PDF features untouched to preserve readability and compatibility.
Open the related toolA small reduction can be correct
A change such as 942 KB to 925 KB means the output is smaller, but the source offered little safe reduction under that mode. File size alone cannot reveal whether it is a scan, a text export, or a file packed with already-compressed images.
Check what is inside the PDF
Try selecting a sentence in a PDF viewer. Selectable text suggests a text layer worth keeping. If each page behaves like one picture, it is likely a scan. An already-optimized scan may have little room to shrink without losing detail.
Why PrivyPDF may skip an image
The tool optimizes ordinary, supported embedded JPEG and PNG-style image streams. It skips unusual encodings, masks, and images for which recompression is unlikely to help. Fonts and vector drawings are not reduced by image recompression.
What to try next
Read the result method and exact byte count. Try High quality, then Balanced. Smallest may turn whole pages into images and remove text selection, forms, and links. Inspect small print on more than one page before sharing.
When to return to the source
If you cannot meet a strict limit legibly, remove unneeded pages or make a smaller export from the original document. Rewriting a cryptographically signed PDF invalidates its signature. Keep the original.
Before you share the result
- Read the method and exact output size.
- Try selecting text before choosing Smallest.
- Inspect the smallest text on at least two pages.
- Retain a signed or important original.