2023
Squoosh
2013
Trimage (lossless) image compressor
by 2 others (via)2012
TinyPNG – Compress PNG images while preserving alpha transparency
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OptiPNG Home Page
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PunyPNG - PNG Compression and Image Optimization - Gracepoint After Five
by 2 othersCompress PNG, JPEG, and GIF images
PunyPNG is a free website optimization tool that dramatically
reduces the file size of your images without any loss of quality.
PNG background-repeat bug in Internet Explorer 7 and 8 « SteveLove.org
For this project, I have a page template with several container elements that all have a 1 pixel by 1 pixel PNG background set to repeat, and it looks great when testing it in IE 7 and IE 8. So, I created my next page template with the same styling. This time, IE 7 and 8 both choked when handling the background-repeat. Instead of repeating, both of these browsers inexplicably tried to stretch the 1×1 image across the entire container. The PNG happened to have 60 percent alpha transparency, but I’m not sure that matters. A coworker suggested making it a 10×10 pixel image instead, just to see what happens. Surprise, surprise. That fixed it.