If you want to reduce the size of some hundred photos, you need a tool like Berberus Mass Image Resizer, to avoid wasting time. As the name suggests, this software can resize your photos in batch. It is fast and can adjust the size of your photos according to a desired size. In this regard, it is possible to adjust only the height, width or both at the same time and automatically set a ratio to keep the highest quality of photos. If you have any plan to publish your photos online, this software can also add watermark to protect them against illegal copying.