• Joseph EkloffJoseph Ekloff, almost 10 years ago

    I've been using this to reduce asset sizes for iOS apps. Apple's default PNG compression doesn't reduce as much as ImageOptim. So you can turn off compression on build.

    If you want to further reduce transparent PNGs with a GUI, there's also http://pngmini.com by the same person/people. It's not automatic though, but it usually compresses the alpha channel even further... I had to do this for an app that had a stack of full-sized images packaged in the app.

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  • Randy HRandy H, almost 10 years ago

    This works well for JPEGs, but for PNGs I find Pngquant to be the best optimization tool. It is great for crunching down PNG files to 8bit transparency. I made a droplet to process images through pngquant, but it doesn't take advantage of the new features.


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  • Jason CosperJason Cosper, almost 10 years ago

    ImageOptim is pretty great on JPEGs. Not only does it strip a lot of cruft — mainly EXIF data & the like — but it also saves them out as progressive JPEGs. It's honestly one of my favorite tools on my Mac.

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  • Raffaello SanzioRaffaello Sanzio, almost 10 years ago

    I've always found TinyPNG.com to compress my PNGs better than ImageOptim. I'd love to hear some comments about these two services, or what you guys use to compress your PNGs.

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  • Murat MutluMurat Mutlu, almost 10 years ago

    This is something I'm heavily researching at the moment, is this the best?

    Know anything similar server-side?

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    • , almost 10 years ago

      This is just a GUI that allows easy access to a few different optimisation libraries, if you look on the site there is links to each of them individually. From there you can look at how to include them on server side.

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