In the same way that my JPGExtra app optimizes JPG files with no loss of image quality, my new PNGExtra app similarly optimizes PNG files by cleanly removing "extras" (or "metadata"). PNGExtra is the world's smallest, fastest and most efficient app for PNG image optimization.
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To demonstrate what PNGExtra does and why it's needed, let's look inside a typical PNG file to see the types of "extras" (or "metadata") and how PNGExtra can optimize such files by cleanly removing those extras.
When an image is made smaller, many of the unseen "extras" within the resulting PNG file can still be just as large, constituting a greater percentage of waste. Typical icon-sized PNG files will benefit the most from optimization by PNGExtra.
Typical websites, particularly shopping and photo sites, contain many individual PNG files on each page. After optimizing those PNG files with PNGExtra, web pages go from "empty" to "full" much faster.
My app for optimizing PNG files is, in itself, an example of optimization. Don't be deceived by PNGExtra's dull, grey appearance because the app is tuned for efficiency and performance.
PNGExtra is an incredibly tiny app, so it should only take a split-second to download onto your computer. It's now available free of charge thanks to people who support me by buying items through my Amazon links.
I've tried to make PNGExtra fairly simple to use, but for the full picture, here's the A–B–C of installing and using the app and understanding the various features plus some tricks to improve your workflow.
PNGExtra will handle most problems, such as corrupt PNG files, disk errors and so forth. This page lists these common errors plus some of the less obvious problems and their solutions.