Blog by an Apple Certified Tech

Use Preview to compress .pdf files

Here are two options to compress the pdf file using Preview application, I hope either one should work for you. Also I would request you to send if there is any other trick which I have not yet discovered.

Both of the compression options are found in the Save As menu. First find a large PDF file that you want to shrink, any will do for this example. Go to File > Save As. In the save box there will be two drop down items. The second one is what we are interested in, Quartz Filter. From the drop down menu select none. This may be counter intuitive at first, however it allows the PDF engine to run and reduce any parts that it can. It doesn’t run any other filters. For the most part on an uncompressed PDF this will produce pleasing results. The image below show the drop down box on the Save As menu.


The option of having no Quartz Filter for the most part is sufficient. This can reduce the file size. This option is known as loss less, so it wont remove anything at all and keep things in high quality. This is needed for PDF’s with images. However for PDF’s with only text or simple geometric shapes to may be better to reduce the file size even more.

To apply a reduction in quality (however it still stays pretty good) in the drop down select “Reduce File Size”, I never notice it at first. This option will crunch images and remove parts of the PDF that are not needed, in a similar method of a jpeg images. There are slight problems with this method. Images turn out horrible and lose all quality. However for text and simple bands of color it is perfect, and the reduction in file size can be massive.

1 Comment:

Anonymous said...

a million thanks, did not know and lazy to find.