Free Tools to Compress and Optimize PNG files to Reduce Image Size

Printer-friendly versionPrinter-friendly versionSend by emailSend by emailPDF versionPDF version

If you are managing a website, you might need to get acquainted with an image file type "PNG". Portable Network Graphics (PNG) is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for Graphics Interchange Format (GIF), and is the most used lossless image compression format on the Web.

Optimizing your images for the web


List of Available Free PNG Optimization Tool for Windows

There are several tools that are free that you can use to optimize the size of your PNG images to make a faster-loading website. The size of the images is shrank but the quality is not lost. Among the common PNG optimization tool that you can download and use are listed below:


PngOptimizer is a free tool. It can clean your PNG files of useless or wrong information. It can reduce your PNG files weight. It can convert your PNG files into other lossless image formats (BMP, GIF, TGA). It supports animated PNG (APNG). It can creates easily available PNG screenshots. It has a simple and productive user interface. It works for Windows XP, VIsta and 7.

Download your free copy at at this link:

OptiPNG: Advanced PNG Optimizer

OptiPNG is a free PNG optimizer that re-compresses 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 checks and corrections.

You can download your free copy here:

PNGOUTWin (Free Trial Only)

PNGOUTWin is an easy-to-use PNG optimizer. It allows you to create smaller image files and speed up your website, reach more potential customers, and decrease your bandwidth costs. You can convert and compress to PNG from TIFF, GIF, BMP, and other formats, or optimize your existing PNG files.

You can download your FREE Trial here:


PNGGauntlet combines the functionality of PNGOUT, OptiPNG, and DeflOpt to create the smallest PNG file possible. During the optimization, no image quality is lost. It only optimizes file size. It can also convert JPG, GIF, TIFF, and BMP files to PNG and the interface itself is ultra-configurable.

You can download your free copy here:


List of Web-based or Online PNG Optimization Tools

  1. TinyPNG =
  2. OptiPNG =
  3. PunyPNG =


Windows Version: