I went back into PSP thinking maybe I didn’t need to use web safe colors and found “Optimized Octree” as an option under “method of color selection” . This brought the image file down to 8.06kb. Then I ran the page with the image through gtmetrix.com and it said, via page speed, the image could be optimized and which brought the file size down to 7.47kb and changed it to a png file in the process (which removed at least one blemish that happen to be in a place that made it look like a decimal.). Now that it’s a new file type, maybe I could optimize yet again.
You could use photoshop with save for web option ( where for jpeg you could reduce the size)
Also this site imageoptimizer.net is an handy tool… This tool is good when you do not have an option to use PS…
That apparently was my beginners luck. was beginners luck (#38, 39, 41, 42), I tried it with a jpg image that wasn’t a graph and it didn’t work at all.
I think the best image optimizer is http://imageoptim.com. It remove the unwanted space , content and color of the files.
I find Photoshop pretty good for JPEG compression but poor for PNG. The best tool I could find for PNGs is Color quantizer. It can produce 8-bit PNG with alpha transparency and you can limit the amount of colours to any amount, even far above 255 - Photoshop can’t do either of those. Size savings from 8-bit PNG can be really big, I ususally get from 2 to 4 times smaller files than with Photoshop. Even full colour 24-bit PNGs saved with Color quantizer take much less space than those saved with Photoshop’s “save for web” - the differences I have found in practice were as large as 300KB vs 500KB (more or less). I think [URL=“http://pngmini.com/”]ImageAlpha is the quivalent for Mac.