Alternatives to PNGOUTWin for all platforms with any license

  • RIOT - Radical Image Optimization Tool icon

    RIOT - Radical Image Optimization Tool

    [The installer contains Opencandy. Be careful during the installation: Forum ] Saving images for web/email/other media with the best compression...

    Free Windows GIMP XnView IrfanView

    • Warning Installer contains Open Candy adware and potentially more: https://www.virustotal.com/en/file/5c69ba60d82abbf73c6ac27a0cf39b054cb5a7cbc6fc8a6cb00d4daa6e069b73/analysis/
  • XnConvert icon

    XnConvert

    XnConvert is an easy image converter for graphic files, photos and images available on Windows, MacOSX and Linux. It supports more than 400 file formats (jpeg, tiff, png, gif, camera raw, jpeg2000, WebP, OpenEXR, ...). You can...

    Free Mac Windows Linux

  • PNGGauntlet icon

    PNGGauntlet

    -Combines PNGOUT, OptiPNG, and DeflOpt to create the smallest PNGs -No image quality is lost — only file size -Converts JPG, GIF, TIFF, and BMP files to PNG -Ultra-configurable PNGGauntlet is a .NET program that uses Ken...

    Free Windows

  • OptiPNG icon

    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 (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity...

    Open Source Mac Windows Linux

  • TinyPNG icon

    TinyPNG

    TinyPNG uses smart lossy compression techniques to reduce the file size of your PNG files. By selectively decreasing the number of colours in the image, fewer bytes are required to store the data. The effect is nearly invisible but it...

    Free Web / Cloud

  • PngOptimizer icon

    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 PNG format using simple drag-and-drop. You can also paste a...

    Open Source Windows PortableApps.com

  • Image Tuner icon

    Image Tuner

    Image Tuner is a free software for batch resizing, converting, watermarking and renaming your digital photos and images from more than 20 image formats to JPEG, BMP, PNG, TIFF and GIF formats. The program will help you to prepare your...

    Free Personal Windows

  • pngcrush 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.

    Open Source Windows Linux

  • TruePNG

    TruePNG is one of the most advanced PNG optimizers available. It does the most exhaustive checks for reductions, that lets it to optimize further, even if it uses a less efficient compression algorithm than others tools. Source:...

    Free Windows

  • optimus.io icon

    optimus.io

    optimus.io offers lossless compression of images available with a WordPress plugin and via API. Benefits: - The file size will be reduced but the image quality remains the same - Bulk optimization - Conversion also to WebP...

    Freemium Web / Cloud

  • Light Image Resizer icon

    Light Image Resizer

    Light Image Resizer, previously called VSO Image Resizer, is a free resize image software. With it you can create e-mail friendly versions of your images, load them faster, move them easily from folder to folder, change their format...

    Free Personal Windows

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  • pngquant 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 preserves full alpha transparency. Generated images are compatible...

    Open Source Mac Windows Linux

  • Photo Size Optimizer icon

    Photo Size Optimizer

    A powerful photo resizer and optimizer for Mac, allows you to optimize all your photos by 80% ~ 20% comparing to their originals while keeping their original resolution, quality.

    Freemium Mac

  • FILEminimizer Pictures icon

    FILEminimizer Pictures

    FILEminimizer Pictures from balesio compresses digital images and photos with file size reductions by up to 98%. For example, a JPEG photo with a size of 5 MB can be reduced to only 0.08 MB. The software features an innovative image...

    Free Windows

  • Shrink O'Matic icon

    Shrink O'Matic

    Shrink O'Matic is an AIR application to easily (batch) resize (shrink) images. It handles JPGs, GIFs and PNGs.

    Free Mac Windows

  • Tinuous icon

    Tinuous

    An image converter batch-processing multiple files. JPEG lossless transformations are implemented. Options are shrink, rotation, correction, output file name setting, etc.

    Free Windows

  • jStrip icon

    jStrip

    jStrip is a free tool to reduce the file size of JPEG images without sacrificing image quality. High-traffic websites with many JPEG images can benefit from decreased bandwidth costs. Less hard disk space will be used by image...

    Free Windows

    • Discontinued jStrip's official site is no longer accessible, but it has been archived by Archive.org: https://web.archive.org/web/20150516175309/http://davidcrowell.com/jstrip
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  • IMAGEmini icon

    IMAGEmini

    IMAGEmini, a powerful photo resizer and optimizer, allows you to optimize all your photos by 80% ~ 20% comparing to their originals while keeping their original resolution, quality and png, jpg, gif formats. With IMAGEmini, you can...

    Commercial Mac

  • JPEG Resampler icon

    JPEG Resampler

    With JPEG Resampler you are able to change the resolution and size of JPEG images of a directory in one go and move them into another folder. Source as well as the destination location can be determined by the user freely. Before...

    Free Windows

  • WinLep icon

    WinLep

    WinLep is a software that compresses JPG images to LEP saving 22%. WinLep compresses JPEG and decompresses LEP, moreover it can display JPEG and LEP compressed files.

    Commercial Windows

  • Squeezer icon

    Squeezer

    Squeezer is a PNG optimizer for Mac OSX that recompresses image files to a smaller size, without losing any information. Super easy to use: Drag-and-drop PNG on squeezer.

    Free Mac

  • ImageSizer icon

    ImageSizer

    ImageSizer is an application built to resize, optimize and rename a batch of jpg images producing a zip file containing the images. ImageSizer also allows users to resize images that are greater than 2880px by 2800px, however the...

    Free Mac Windows Adobe AIR

  • SqueezeFile icon

    SqueezeFile

    Works with all common image formats like png, jpeg, bmp, tiff and Microsoft Office documents pptx, docx, xlsx.

    Free Mac Windows

  • pngCrushrrr icon

    pngCrushrrr

    Drag your PNGs onto PNGCrushrrr and get super-optimized files ready to be emailed or posted on the web! Supports one or more files being dropped and instead of overwriting your original files, PNGCrushrrr outputs .crushed.png files...

    Free Mac

    • Discontinued Last version, 1.0, was released on April, 2005. It can be still downloaded from Wayback Machine.
  • AdvanceCOMP

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

    Open Source Mac Windows Linux

  • Mini-Compressor icon

    Mini-Compressor

    Mini-Compressor is an easy to use image compression tool. Compress images by right clicking on the images or folder of images. A viable alternative to other photo editing software if all you need to do is quickly compress a image.

    Commercial Windows

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