Can I automate Resize JPEGs in a batch script?

Yes. Using the command-line options, you can fully automate Resize JPEGs in batch files or scheduled tasks. For example:

resizejpegs.exe -d "c:\my photos\" -r -a -c -x 1600 -e

This loads all JPEG files from the directory, resizes the originals in place, always resizes even if already smaller, closes when done, sets a maximum width of 1600 pixels, and retains the original file date.