Ping
If you deal with PNG files, you need this app.
PNG is a great format. It's lossless, patent-free, open, and supported by all sorts of stuff. It's great for screenshots, line drawings, and anything that needs to look good. Unfortunately, many programs which save to PNG format do a horrible job of it. Adobe Photoshop is one of the worst offenders, creating PNG files many times the size they should be. So we created Ping. To use it, simply drop a PNG file on it. Ping will then optimize the file, often reducing its size to a mere fraction of the original.
Ping works by optimizing a variety of aspects of the PNG format (palette, compression parameters, IDAT chunks, etc.) but it does not remove any image information from the file. Since PNG is a lossless format, it certainly wouldn't make sense to throw away information.
Unlike similar utilities, Ping is a Universal Binary. Not only that, but we've optimized OptiPNG (the technology that powers Ping) for the latest Intel chips -- taking advantage of all the cool (at least to us geeks) features that are at the heart of Apple's latest and greatest computers.
Tags: graphics , png , image , photo , compression
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6 Opinions:
If you want something that does both (the crushing of Ping combined with the gamma removal of GammaSlamma), you can use the widget PNGpong. It's not a standalone unfortunately, but it still works really well so I have since switched to that (it uses both the pngcrush and the optipng "engines" already mentioned below).
The website for this handy utility has been offline for weeks now. You can still snatch the download at MacUpdate.
Re stripping the gamma (m4c_b0y), there is GammaSlamma which also uses PNGCRUSH, but yeah, it might be nice to have both features available in one app.
I already use pngcrush with contextual menu items that I made with OnMyCommand.
I'll give this a try: Ping's OptiPNG compression may have better or faster compression than pngcrush...but unless I can access Ping's options similarly, a drag and drop app probably won't be easier or more convenient.
It does shrink the size of the files, but to get it to work you have to drag the PNG files onto the app file itself. That problem is very troublesome.
PNGCrush works a lot better for me, and it gets rid of the gamma too (http://user.fundy.net/morris/photoshop03.shtml), (http://pmt.sourceforge.net/pngcrush/)
Only problem with that is that it you have to use terminal commands. Anyone know of any automator actions to simplify it?