Website Image Speed Test VS Pingo

If you share the site URL we can have a look and tell you what images you need to change. Alternatively, there are various tools that can help: Https://webspeedtest.cloudinary.com - image analysis tool that will actually give you optimized images (be aware that Google Sites only accepts JPEGs, PNGs and GIFs) Https://squoosh.app/ - image compressor if you want to manually do it and go with a higher level of... Source: over 2 years ago

I like dithered images and appreciate the author's post. If you don't, but you want your webpages to load fast, look into WebP and AVIF images. Load them opportunistically using the html5 PICTURE tag - no JS required and no worry about old browsers not supporting new formats. Even plain lossless encoding of legacy formats goes a long way. Test your own site for ideas: https://webspeedtest.cloudinary.com. - Source: Hacker News / over 2 years ago

I've tried a few, the best one was pingo (https://css-ig.net/pingo). Pingo -s9 gives better results than oxipng with Zopfli, while being usually two order of magnitudes faster. It's also faster than "regular" oxipng while being better. I can usually shave of 15%/20% of the size of png files I encounter. One thing I didn't check is that you might pay that in decoding time, I've never seen anybody talking about that... - Source: Hacker News / almost 2 years ago

Pinga, GUI for Pingo (https://css-ig.net/pingo) for lossless photo compression while keeping the metadata. Source: almost 3 years ago