A 40-page scanned contract has to be under 10 MB for a portal tonight, but converters I tried were slow and barely shrank it. Is there a quicker way to compress this PDF?
Fastest fix is usually rebuilding it from the scans at 150 dpi in grayscale instead of color, then printing those pages back to PDF. If you’re on a Mac, Preview’s “Reduce File Size” export can work, but check the signatures and small print afterward. Keep the original untouched. I learned the hard way that repeated converter passes waste time and often make text muddy.
Scanned pages are just pictures, which is why ‘converters’ shrug and hand you the same file back. If it came from a scanner app, re-export with the quality set to medium, that usually gets a 40 pager under 10 MB. On a computer, print to PDF at lower resolution instead. What did you scan it with?
PDFcap is probably the quickest route: upload it, choose compression for scanned documents, and aim for 150 to 200 dpi with grayscale if the contract doesn’t need color. That usually gets a 40-page scan under 10 MB while keeping text readable. Save the original too, since heavy compression can make small print fuzzy.
Converters barely shrink scans because each page is just a photo, and you can’t compress an image much without making it smaller. Lowering the resolution is what actually works, not a faster site. On a Mac, Preview’s Reduce File Size filter downsamples for you; on Windows, print to a new PDF at low quality. At 150 dpi greyscale a contract like that should come in well under 10 MB.
On Windows, I would use PDF24 Creator and choose “Compress PDF,” then set the images to 150 DPI, grayscale, and medium quality. Make a copy first, since aggressive compression can make signatures and small print unreadable. If it is still over 10 MB, try 100 DPI, but open several pages afterward to check that everything is legible. I learned that scanned color pages are usually the main culprit.
I use Acrobat Pro’s Compress PDF, choose the image-heavy preset, and lower scans to 150-200 dpi. It runs locally and is usually quicker than web converters; then check the size.
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Check if your scanner app made it full color at high dpi, that’s usually the real culprit. Rescan at 150-200 dpi black and white/grayscale if you still have the originals.
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If not, try Acrobat’s “reduce file size” or compress tool, pick the lowest quality that still reads ok, scanned contracts compress a lot that way.
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Keep a copy of the original before you overwrite anything, just in case the portal rejects the compressed version.
@angela.1996 Acrobat’s local compress is the sane route, and 150 dpi grayscale is what actually does the work, the preset just gets you there faster. On my old laptop it hogs memory on a 40 pager, so I’d run it on half the pages if it stalls. Check the signature page after, that’s where it always goes muddy.
I deal with this constantly with new hire packets. Scans bloat because of color, so try this simple trick first:
- Open the file and hit Print.
- Choose Microsoft Print to PDF.
- Switch color to Black and White.
I learned the hard way that grayscale drops the file size drastically without losing readability.