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Adobe Acrobat - Reduce PDF File Size


As you are editing a PDF file it tends to increase in size. Sometimes this does not pose a problem, especially where the file is very small to start with. For example, if a file starts off being 50KB and ends up being 60KB, then that probably won't make much of a difference to anything. However, if your PDF file is 10MB, you probably won't want it to grow to 12MB, especially if you're expecting people to download it from a website. There is something you can try though in order to reduce the size of the file: recreate it.

Scenario

An interesting point with Adobe Acrobat, or at least with the old version (v5) that I'm using, is that if you replace or delete pages from a PDF file, the size of the file doesn't normally go down - in fact it normally goes up. I think the reason for this is that information relating to the replaced (or deleted) page does not get removed from the file. This means that if you replace a big (in MBs) page with a much smaller one, the size of the file will increase by roughly the size of the smaller file because the big page is still part of the PDF file, it's just not displayed.

Solution

To reduce the size of the file, what you have to do is to create a new PDF file that contains one page. It doesn't matter what the page contains, it just needs to be there. Then, what you do is to insert the original (big) file into the new file, after page 1. You can then delete page 1, which leaves you with your original (big) file. You then need to save this file, either replacing the original one or under a new name, whatever takes your fancy. The resultant file doesn't seem to contain any redundant information and is therefore smaller than the original file.



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