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I have some extensive website that I need to analyze the images and see if they can be optimized. Can any one recommend a good program for this?

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optamizing should be optimizing please update your topic. – Chris Sep 24 '10 at 15:03
This question, while on topic is seeking opinions rather than an exact answer. I've converted it to community wiki. – Tim Post Sep 27 '10 at 16:32

Adobe Photoshop has a pretty good optimizer built in. (Save for web & devices) An older version of it is Adobe ImageReady if you can find it in a bargain bin somewhere.

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+1 - ... and don't forget batch processing – danlefree Sep 24 '10 at 16:09
CTRL+SHIFT+ALT+S (save for web) shortcut :) – JP Hellemons Sep 28 '10 at 12:52
@JP Hellemons - anything that requires 4 keys depressed simultaneously is not a shortcut IMO. My mouse is functional, and I don't need to be able to play Rachmaninoff on my left hand in order to pull it off. The .078 seconds saved simply isn't worth the savings. – Joel Etherton Sep 28 '10 at 13:07

+1 for smush.it, if you use the firefox addon Yslow http://developer.yahoo.com/yslow/

it has smush.it built in as part of its optimization arsenal. It offers further file savings in addition to photoshops 'save for web' feature.

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I've just tested a few programs last week, on my tests PNGOUT produced the smallest PNGs.

Note that you can get even better results by modifying the image, especially by reducing the number of colors used.

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I find that photoshop is lees effective than online tools. If you compromise with 80% quality of image then its size can be reduced to half.

Better way is to take a good resolution image then compress it using some onine tools as suggested here. Then use Office image viewer to resize and compression.

I hope u'll get what you want

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For Mac OS X, I love ImageOptim

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