How to reduce the size of Adobe PDF documents

I have a collection of articles that I collected throughout the years and converted to pdf documents. But recently I have to send some of them to my friend, being on dial up, I know that it will be a messy business if I try to send them without trying to reduce the size of the documents.

Use the Save as command instead of Save

This is No. 1 suggestion for reducing the sizes of  PDFs. After you make any changes to your PDF, select Save As, instead of just Save, this will overwrite the entire PDF. Otherwise, if you just click Save, changes are appended to your file, and you’ll notice a slow and steady accretion of kilobytes.

Use the PDF Optimizer

By selecting Advanced > PDF Optimizer > Audit Space Usage, you can find out which elements in your PDF (fonts? images?) are taking up the most space and make changes accordingly.

Reduce Graphics and Images

We all knew that image files takes many times more the disk space than text. So reduce them or use optimized images, if necessary.

Vector-based graphics scale perfectly, look better and take up less space than their GIF counterparts.

If you have to insert a graphic as a bitmap, prepare it for maximum compression and minimum dimensions. Don’t compress the graphic beforehand, because distilling them in the PDF may cause the creation of noticeable artifacts in the image.

To experiment with the image compression quality to size ratios, select Advanced > PDF Optimizer, and on the images tab select compression options for color, grayscale, and monochrome images. Or, select Enable Adaptive Compression and drag the slider to balance file size and quality.

Use RGB colour

PGB uses less space than CMYK, so if you are not intending to print the documents in high quality it is recommended to use RGB than CMYK

Use Minimum fonts

Fonts use space, try to use minimal space and don’t embed many fonts as this will increase the size of the document considerably.

Use latest Acrobat

Use the latest version of the software, as there will be minor improvements in the compression algorithms that may help you to achieve the desired results. an example Acrobat 5 (PDF version 1.4) introduced JBIG2 (Joint Bilevel Image Experts Group) compression, which is superior to the CCITT or Zip algorithms that previous versions used when compressing scanned monochromatic copy. Most PDF users have made the switch to newer versions of Acrobat, but if you’re still using an old copy, it may be time to make the switch.

Use special Software

There are specialized software that can reduce the size of the document. Here are a few links that may of help.

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Reference and Links

Reduce your PDF file size

How can I reduce PDF file size?

How do you reduce size of .pdf file?

2 thoughts on “How to reduce the size of Adobe PDF documents

  1. How to reduce the size of Adobe PDF documents?
    if yoy have inserted a new text and want to reduce font size.. then right click- will prompt you to font selection and size

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