LiveQuartz Photo Edit is a simple and powerful photo editor for the Mac. It is based on non destructive layers and filters. The layers are at the left and the filters are at the right of the window.

When we create a PDF file in Mac the file size seems to be very large. We always search for third party software or any other ways to reduce the file size. Here are some of the steps to follow to reduce the pdf file size in Mac.
Fix 1: Use Quartz filter
We can use Mac default viewer-preview to reduce the pdf file size for free.

1. At First, open the PDF file using preview.
2. Next, File->save as from which we select “Reduce file size” “Quartz filter” and select save button.
3. The file size of our should have reduced now.

Fix 2: Reduce the data storage
When the application is larger because of the data stored as an image resource.We can follow these steps.

1. The file size of Adobe illustrator produced PDF is noted and can be opened in previewed and resave it.
2. Shrinking, a simple, small, internal tool that automatically stripped the needless metadata from PDF by resaving using Apple’s PDF processor, that removes cruft.
3. The original files can be reserved with prefix org for backup safe.

Fix 3: Reduce the file size using unzip
If we download and unzip Reduce File Size (75℅) where the numeric related to settings in the filter and not the amount of reduction.

1. Drop the unzipped .quilter. file into ~/Library/Filters in Leopard/snow Leopard or/Library/PDF services in Lion.
2. Next, when we want to reduce the file size of a PDF, we can load the file in preview select ”save as” and save using Quartz filter installed.

SEE ALSO: Convert Doc to PDF in Mac OS X – MS Word How to Guide
Fix 4: Reduce the file size using thumbnail

1. Send the PDF file to your email.
2. Open received email ->file -> export as pdf to desktop.
3. Open PDF on desktop ->view -> thumbnail ->dragged particular page of document to desktop.
4. re-saved.

File size was automatically reduced from 9MB to 581KB.
Steps to Create own filter manually using reduce file size(75%) are as follows

1. We can select /Applications/Utilities and launch ColorSync Utility.
2. Next select “Filters” icon in the application toolbar.Go for “Reduce File Size” filter and use downward arrow in gray circle icon to the right.s
3. Select “Duplicate filter” in the menu, and using twisty arrow open duplicated filter and each “image sampling” and “Image Compression”.
4. Set “Image Sampling” ” Scale” to 75℅ and “Max” to 1280 and also set “Image Compression” move the arrow halfway between the rightmost marks.
5. Just rename the filter to apt name.

Thanks a lot!
I've been looking for a way to do this for a while. I scan quite a lot of documents for archival purposes, but when I have to E-Mail one of them, they are usually to large. The included reduce file size PDF option is just crap.

interesting, but definitely not original, this topic is found a lot of times on the web
http://apple.stackexchange.com/questions/33702/compress-pdf-with-adjustable-ratio

I scanned through the same topic last week myself, but defaulted to finding an app that does it way better than my ability to futz with libraries. Take a look at PDF Squeezer on the App Store – for $1.99, you cannot beat it. I know it may not be hacky enough, but as a basic user, this program rocks!
http://itunes.apple.com/us/app/pdf-squeezer/id504700302?mt=12

You can edit or add new filters using the GUI:
/Applications/Utilities/ColorSync Utility

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oh.. what an overlook from my side!
best of all, it also puts them in user Library, good when upgrading.

I found that your settings as described didn't yield good results. None of them resulted in a clear pdf. As such I also adjusted the ImageScaleFactor setting in the quartz filter file. With these settings, the high quality filter was indistinguishable from the 'no quartz filter' file.
For this test I used a 1.2 MB jpg file and exported it to pdf. Here's my filter settings and resulting file size:
PDF with no quartz filter file size: 4.4 MB
Name: Reduce File Size_Low Quality
Compression Quality: 0.5
ImageScaleFactor: 0.5
ImageSizeMax: 842
File Size: 250 KB
Name: Reduce File Size_Intermediate Quality
Compression Quality: 0.75
ImageScaleFactor: 0.6
ImageSizeMax: 1684
File Size: 442 KB
Name: Reduce File Size_High Quality
Compression Quality: 0.95
ImageScaleFactor: 0.75
ImageSizeMax: 3508
File Size: 774 KB

Cannot understand why you edited filters by hand when it's years that there is the ColorSync Utility app in your Mac that makes all this editing definitely easier.

I have tried on several occasions to use Colorsync utility to create reduced file-size output settings like this. However every time I ended up frustrated by the sheer bugginess of the colorsync utility. Settings would revert to the defaults after saving the preset, etc.
I'm definitely going to try the approach outlined in this hint.
Having this facility is great when you are preparing a pdf file to send to a print shop and you want someone to proof-read your work without having to send them a 20 Mb+ file.

'Having this facility is great when you are preparing a pdf file to send to a print shop and you want someone to proof-read your work without having to send them a 20 Mb+ file.'
That's one of the reasons I use Colorsync Utility to create PDF filters. I made three different filters with three different compression results that I use according to the output needs: archiving, proofreading, send to print shop.
I made my filters with Colorsync Utility and I didn't occur in the problems you mentioned. It's real thet C.U. is quirky and you need to know its idiosyncrasies, but it gets its jobs done.

great post.
But does anyone know some way to merge different pdf in same file using export function and reduce size at the same time?
When I need to merge and reduce PDF file size I need to do too many steps.
open pdf 1
open pdf 2
move pages from pdf2 to pdf1
print as PDF (generate new PDF merged)
open PDF Merged
export > reduce file size
Some tip?

There is a major bug in Lion (up to 10.7.4 so far) so that user Quartz Filters created in ColorSync Utility don't work.
So duplicating the system filters and editing in a text editor is your only choice for now.

Is there a way to get these to show up in the Filter Dropdown menu with different names? Despite naming the files with Good, Better and Best in their name, they all have the same name; Reduce Fie Size. Is this file's name determined in the file's code?

Question: How do I calculate ImageSizeMax for US Standard 8.5' x 11' paper size? Great hint. Thank you!

'interesting, but definitely not original, this topic is found a lot of times on the web'
Yes there are other 'versions' of this that can be found on the web but this is a helpful addition! This (PDF file size) can be a frustrating area.
I particularly like the way you can show the different file sizes in Preview -- that is very helpful.
Thank you for the help.
Tony

Are these settings wiped out when updating the OS?

Mavericks update: This hint works reasonably well in Mavericks, but all four settings have the same name in the drop down menu in the Export command from Preview.app. I used the names suggested, and of the four identical appearing names for Quartz filters, best is on top, and proceeds decrescendo (downwards) to the default filter.
Mavericks accepted /System/Library/Filters/ as a site for the new files. Reboot did not resolve. I've decided not to care, but if a remedy is proposed, I agree to notice.

Change the string near the end of the file to whatever you prefer:
<key>Name</key>
<string>Reduce File Size Best</string>

In Mavericks 10.9.4 I was able to use the ColorSync Utility to duplicate and modify the filter.. however to make it show up in Preview, I had to move the .qfilter files from user/library/filters to system/library/filters.
Dave