Smush finished in last place, but that’s because it uses lossless compression by default in its free version. EDespite using lossy compression, Imagify only shrank the image by ~47%. Sticking with default settings, ShortPixel is the clear winner, coming in with a ~90% reduction in file size using its lossy compression. Note: Lossy compression usually produces the smallest image sizes without losing quality, making it the best option in most situations. Lossless (Paid version required for Lossy)

It’s a high-resolution landscape shot with a range of complex colors, and elements we can use to notice any imperfections during the compression.Īnd here are the test results after running the JPG through each WordPress image optimizer: Plugin This is a 3000 x 2000px JPG image with a size of 3.9 MB. Testing each WordPress image optimizer with JPG files This is what we’re interested in most-how each WordPress image optimizer performs right out of the box, without forcing the user to complete any tedious steps. By that, we mean that the average user would typically install the image compression plugin and not mess with too many default settings. Though it’s not a perfect comparison, by sticking with the default settings, we’re emulating the experience for a casual user. We’ll stick with the default settings for all plugins and not resize the photos at all.We’ll run two tests: one for JPG files and one for PNGs.But we have a process to make our test as accurate as possible. In addition, some optimizers provide automated resizing tools, which can cut down the file size drastically.īecause of those differences, it’s hard to come up with an objective comparison. Optimole, on the other hand, optimizes all images based on the same defaults, or the ones set by you. For instance, Imagify has Normal, Aggressive, and Ultra optimization modes.

This gets a bit tricky, since some of the WordPress image optimizer plugins offer varying levels of optimization. We want to see how effectively each plugin could optimize the same image. To find the best image optimization plugin for WordPress, we have to put these tools to the test. Go to top Hands-on tests with these image optimizer plugins

Smush vs tinypng