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Better PDF File Size Reduction in OS X was published on Thursday, February 25th, 2010.

Thanks to Brian Christiansen for catching the error!

#Shrinkit mac os install

Update 27 Mar 12: edited the Lion install directory to remove an errant ~.

There are two workarounds described in the thread: either to open and save files with ColorSync Utility itself, or to copy the filter to another folder in your Library (or install it there in the first place, above). Update 2 Aug 11: apparently there have been changes in Lion - here’s an Apple forum discussion of the problem. Belorussian courtesy Patricia Clausnitzer.If anyone comes up with an even better combination of values, I’d love to hear about it in the comments.

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Of course, you now have the knowledge needed to fiddle with the filter to create your own optimal balance of quality and compression, whether you downloaded and installed the zip or set it up manually - either way, ColorSync Utility has what you need. The maximum size of images in my version is also quite a bit bigger than the original’s - 1280 versus 512 - which means that the file size reductions won’t be the same as the original. In the original Reduce File Size filter, both are at 50%.

Rename the filter to whatever will help you remember its purpose.Īs you can see from the values, the “75%” part of the filter’s name comes from the fact that two of the filter’s values are 75%.

You’ll have to eyeball it (unless you bust out xScope or a similar tool) but you should be able to get it fairly close to the halfway point.

Under “Image Compression”, move the arrow so it’s halfway between the rightmost marks.

Under “Image Sampling”, set “Scale” to 75% and “Max” to 1280.

Use the twisty arrow to open the duplicated filter, then open each of “Image Sampling” and “Image Compression”.Find the “Reduce File Size” filter and click on the little downward-arrow-in-gray-circle icon to the right.Select the “Filters” icon in the application’s toolbar.Go to /Applications/Utilities and launch ColorSync Utility.If you’re the hands-on type who’d rather set things up yourself, or you’re a paranoid type who doesn’t trust downloading zipped files from sites you don’t control (and I actually don’t blame you if you are), then you can manually create your own filter like so: The next time you need to reduce the size of a PDF, load it up in Preview, choose “Save As…”, and save it using the Quartz filter you just installed. qfilter file into ~/Library/Filters in Leopard/Snow Leopard or /Library/PDF Services in Lion. Note that the “75%” relates to settings in the filter, not the amount of reduction you’ll get by using it. Download and unzip Reduce File Size (75%).If you’d like to experience this size reduction for yourself (and how’s that for an inversion of common spam tropes?) it’s pretty simple: That 175MB PDF gets taken down to 34MB with what I created. Thus armed with knowledge, I set about creating a filter that struck, in my estimation, a reasonable balance between image quality and file size reduction.

There I discovered that anyone can create their own Quartz filters, which was the key I needed.

#Shrinkit mac os mac os x

I Googled around a bit and found “ Quality reduced file size in Mac OS X Preview” from early 2006. So not only are the images infested with compression artifacts, they also tend to get that lovely up-scaling blur.

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That’s because the filter achieves its file size reduction by scaling all the images down by at least 50% and to no more than 512 pixels on a side, plus it uses aggressive JPEG compression. That will indeed drastically shrink the file size - that 175MB PDF goes down to 13MB - but it can also make the slides look thoroughly awful. If the slides are image-heavy, then you can always load the PDF into Preview and then do a “Save As…” where you select the “Reduce File Size” Quartz filter. If the slides use lots of bitmapped images, or you’re not on Snow Leopard, ShrinkIt can’t help you. So what’s the answer? ShrinkIt is fine if the slides use lots of vectors and you’re running Snow Leopard. Whatever you personally may think of net access at conferences, at this point, not providing net access is roughly akin to not providing functioning bathrooms. Not to mention the network will grind to a nearly complete halt. Now, hard drives and bandwidth may be cheap, but when you have four hundred plus attendees all trying to download the same 175MB PDF at the same time, the venue’s conference manager will drop by to find out what the bleeding eyestalks your attendees are doing and why it’s taking down the entire outbound pipe. We had one speaker last year whose lovingly crafted and beautifully designed 151-slide deck resulted in a 175MB PDF. One of the things you discover as a speaker and, especially, a conference organizer is this: Keynote generates really frickin’ enormous PDFs.