You can check the Before & After in Preview and Original tabs.
Then resize the images according to your need.Click on Edit Photos >Add Filter, choose Resize.Click Add Photos to import your images to the program, also, you can drag and drop images to it.Grab a free copy of BatchPhoto from Bits&Coffee Software, it has both MacOS and Windows versions, install and open the app.How to Bulk Resize Images on Mac or Windows? Upload and share image to FTP or social accounts.Allow batch editing: rename, resize, crop, add effect, rotate, change DPI, replace color, add watermark, comment, add frames or border, etc.It is now available on macOS and Windows. Also, you can apply graphical effects to all photos at one time. Since 2005, BatchPhoto offers service to batch process images, edit and convert 170+ formats of images, but still highly preserve the original image quality. There is a big selection of ways to bulk resize images, but the easiest and most efficient is using the best batch image resizer- BatchPhoto. The Easiest Way to Bulk Resize Images on Mac & Windows