ReaConverter 7 Standard (lifetime license)

ReaConverter is an ultra-fast batch image converter that supports no less than 500 input formats and 55 output formats.

The simple and clean interface of the program makes it easy to use even for novices. The program also provides a lot of additional features, including batch editing and modification options.

Includes an additional feature called Watch Folders. With Watch Folders you can configure reaConverter to monitor your image folders and automatically apply specific actions to all files included in each one of them.

ReaConverter is also available as

ReaConverter is also available as a an online conversion service.
https://online.reaconverter.com/