Scanned PDFs are large because every page is a bitmap. GekiPDF downsamples those bitmaps — the text and layout you see stay sharp, while file size drops by up to 95%.
A 32 MB, 16-page scan typically lands near 1.5 MB in about a second, which is enough to attach it to any email.
Frequently asked questions
Why are scanned PDFs so big?
Each page stores a full-resolution image, often 300 DPI in colour.
Will OCR still work after compression?
Yes at Recommended and Light levels; run OCR before Extreme compression if accuracy matters.
Can I compress to greyscale?
Compression keeps the colour profile; convert to greyscale in an image editor first if you need maximum reduction.
Do it in the full tool
Open Compress PDF for all options, or jump straight to another step below.