Question: irfanview how to batch resize?
Answer: Download the free software called IrfanView and IrfanView plugins (www.irfanview.com). ...  In Irfanview Go to File (top left) and select Batch conversion/Rename. In the Batch Conversion Window 'Add' the images you would like to resize or 'Add all'. ...  Specify an Output Directory (on the left).