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As a web optimizer, you might now that the Internet’s main bloatware is images. There are so many tools out there for lossless PNG optimization. Which one is the best now?
I took a sample .png image sized 46966 bytes and ran it across well established optimizing software. Each time maximum compression/optimization flags were passed.
What I’ve tested:
pngout(a less known optimizer with closed source deflate compression algorithm that beats most known tools)
optipng(an often choice for most)
zopflipng(the new folk by Google, actually a companion tool to their zopfli library)
|Tool name||Flags||Result size, bytes|
Install and use Zopfling
Without much further ado, I will tell you how to use Zopfling to crunch your PNG images without loss of quality.
In CentOS/RHEL, we have made it available for easy install. Setup our repository, then:
yum -y install zopfli
That’s it! Now you can run
zopflipng -m /path/to/your.png /path/to/your_optimized.png to crunch size without losing a bit of visible information.