Online image editors are handy, but they almost universally limit you to a single image at a time. PicGhost can help when you need some quick bulk editing.
You can upload up to 20 images at a time to PicGhost for resizing and watermarking. PicGhost offers a drop-down menu of preset sizes, the option to set a custom size, or resizing of your image to fit the largest or smallest image in the batch. You don’t need to apply a watermark but can do so either as a basic text overlay or with an image you’ve provided. As Seen On LifeHacker