any freeware can change .png files to .jpg in a large number?

[compro_1975]

my co-worker change all pictures(10K into png) now hav to change it .jpg, is there a way to do mass changin?

 

[ah.zeep]

Irfanview (http://www.irfanview.com)

 

[compro_1975]

tks pal!!!!!

 

[Lum]

You may want to try this also:
http://www.xnview.com

 

[SheepYeo]

I've been using this for a long time.
Works like a charm

http://www.faststone.org/FSResizerDetail.htm