Alternatives to ImageOptim for all platforms with Open Source License

  • FileOptimizer

    FileOptimizer is a lossless file size optimizer supporting AIR, APK, APNG APPX, BMP, CBZ, DOCX, DLL, EPUB, EXE, GIF, GZ, ICO, JAR, JPEG, MNG, MP3, MPP, PNG, PPTX, ODT...

    Free Open Source Windows Linux Wine

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  • OptiPNG

    OptiPNG is a command-line PNG optimizer that recompresses image files to a smaller size, without losing any information. This program also converts external formats...

    Free Open Source Mac Windows Linux

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  • GraphicsMagick

    GraphicsMagick is the swiss army knife of image processing. Comprised of 282K physical lines (according to David A. Wheelers SLOCCount) of source code in the base...

    Free Open Source Mac Windows Linux

    GraphicsMagick icon
  • pngquant

    pngquant is a command-line utility and a library for lossy compression of PNG images. The conversion reduces file sizes significantly (often as much as 70%) and...

    Free Open Source Mac Windows Linux

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  • PngOptimizer

    PngOptimizer compresses graphics files and removes extra, unnecessary data without affecting quality. It will update PNG files or converting BMP, GIF or TGA files to the...

    Free Open Source Windows Linux PortableApps.com

    PngOptimizer icon
  • ImageAlpha

    ImageAlpha is a GUI for pngnq and pngquant. It allows you to easily generate paletted PNG images with full alpha channel. These images are usually 40-60% smaller than...

    Free Open Source Mac

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    ImageAlpha icon
  • pngcrush

    Pngcrush is an optimizer for PNG (Portable Network Graphics) files. It can be run from a commandline in an MSDOS window, or from a UNIX or LINUX commandline.

    Free Open Source Windows Linux

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  • JPEG Archive

    Utilities for archiving photos for saving to long term storage or serving over the web. The goals are: use a common, well supported format (JPEG), minimize storage space...

    Free Open Source Mac Windows Linux BSD

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  • Gifsicle

    Gifsicle is a command-line tool for creating, editing, and getting information about GIF images and animations. Making a GIF animation with gifsicle is easy. Some...

    Free Open Source Mac Windows Linux

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  • Crunch

    Crunch - Insane(ly slow but wicked good) PNG image optimization. It combines selective bit depth, color type, and color palette reduction with zopfli DEFLATE compression...

    Free Open Source Mac Linux

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  • AdvanceCOMP

    A collection of recompression utilities for your ZIP archives, PNG snapshots, MNG video clips and GZ files.

    Free Open Source Mac Windows Linux

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Platforms

Desktop

Show 9 less popular platforms