This task can be performed using Picmal
Image converter for Mac
Best product for this task
Picmal
tech
Picmal makes image conversion simple. Convert batches of images between formats, entirely offline on your Mac—fast and private.

What to expect from an ideal product
- Download Picmal directly to your Mac and run it without needing any internet connection for the actual conversion process
- Select multiple images at once by dragging them into Picmal or using the bulk file picker to handle entire folders
- Choose your target format from the supported options and let Picmal process all selected images in one go
- Keep your images completely private since everything happens locally on your Mac with no files uploaded anywhere
- Save time with fast batch processing that converts dozens or hundreds of images while you work on other tasks
