Why are some PDFs so large?
A document may contain high-resolution photographs or scanned pages. When images account for most of the size, lowering their resolution can sometimes produce a much smaller output.
How this compressor works
This tool rasterizes each page to an optimized JPG image and places those images in a new PDF. It can shrink scans, but the text becomes non-selectable and unsearchable, and small writing may look less sharp.
Choose your resolution
72 DPI may be sufficient for quick review but is rarely ideal for detailed printing. Try 100 or 150 DPI for clearer small text. Some files can grow because the original was already efficiently encoded.
When to use a different method
For digitally created reports, keep your original text-based file or use a text-preserving optimizer. Always compare the file size and readability of both versions before sharing.