Why PDFs Get So Large
The most common culprits for oversized PDFs:
- 1.Scanned pages — each page is stored as a high-res photo, easily 2–5MB per page
- 2.High-resolution photos embedded at print quality (300 DPI)
- 3.Embedded fonts — full font files add hundreds of KB each
- 4.Form fields and layers — annotations and interactive elements add file weight
How to Reduce PDF File Size (3 Steps)
1
Upload your PDF
Go to pdf.it.com/compress-pdf and drag your file into the upload area. Free plan handles files up to 25MB.
2
Choose compression level
Light = minimal quality loss. Medium = good balance for most use cases. Extreme = maximum size reduction (best for strict upload limits).
3
Download the smaller PDF
Click Compress PDF. Download the result and check the new file size. If still too large, try a higher compression level or split the document first.
Typical Size Reductions
| Original PDF | After Medium | After Extreme |
|---|---|---|
| 10MB scanned document | 2–3MB | 500KB–1MB |
| 5MB photo-heavy PDF | 1–2MB | 300–600KB |
| 3MB text-heavy document | 1.5–2MB | 800KB–1.2MB |
Results vary based on content type and original compression.
Still Too Large? Try These
- ✓ Split the PDF into sections and compress each part
- ✓ Flatten the PDF first to remove form layers before compressing
- ✓ Use Extreme compression if you haven't already
- ✓ For email: most services cap at 20–25MB. Medium compression usually gets there.