Preview can handle this task. It's found in your Applications folder. If you have a whole bunch of pictures all in one folder, you could even write an Automator action that automates this task for you.
Preview can handle this task. It's found in your Applications folder. If you have a whole bunch of pictures all in one folder, you could even write an Automator action that automates this task for you.
Yes, use Preview's Save As feature and play around with the parameters. Alternatively, if that doesn't meet your needs, I'm almost positive that GraphicConverter will.
Make sure you've got the image manipulation plugin. Eg downsizing to 800x600:
Invoke QS
Select picture, TAB
Type 'scale', TAB, and type '800'
Takes about 2 seconds.
Or if you you scale pictures a lot then set up a trigger. I put a hot corner on my girlfriend's account so she can just drag pictures to the corner and it resizes them. Or you could do a hot key.