Converting .jpg to .png

I've got a whole load of files I need to change from .jpg format and save to .png. Rather then opening them all up in PS and saving them as .png individually, is there a quicker way I can do it?

Thanks.

Yeah - do it with automator! ( OS X 10.4)
Just drag the 'get selected finder items' action and then use (Preview's) "change type of images" action.

Save this as a plug-in or application and viola! You're done.

You can use GraphicConverter X's batch function to do what you want.

Are there any othwer free programmes because I don't have automator and when using GC, all the .png's only open up using GC.

Please help

After you convert them to .png's in GC, you have to go back and change the default for .png's back to PS. Apple key + I on a .png, look for the "default app" in the resulting window, use the drop-down to select PS, make sure you check the box that says "Apply to all".

If you are using Tiger, you have Automater.

If you want to keep it's true color, i would suggest doing it the old fashion way in PS.

I use Imagewell (4 mice by Macworld) and it's free.

Very cool and easy to use.

http://www.xtralean.com/IWOverview.html