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I perform lots of small edits of JPGs daily on my computer, and was wondering whether there was a way to perform cropping and rotation without the loss of quality during recompression. I know there are programs out there like BetterJPG which do this, but shouldn't this function already exist in Photoshop?

Any thoughts on this?

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Not what you asked, but IrfanView also does this –  Rich Homolka Aug 4 '12 at 4:33
    
I have an earlier version of PS, but believe it does these operations losslessly, at least for 90° rotations and rectangular crops. –  martineau Aug 4 '12 at 4:41
    
Can you losslessly edit a .JPG? Any changes to the image must be made while it is decompressed... and the only way to get a modified, decompressed image back into a .JPG is to recompress it... Cropping isn't just a "Oh, let's cut out this data here" once you start to involve compression. –  Darth Android Aug 4 '12 at 7:49

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