FastStone Image Viewer is an image browser, viewer, converter, and editor with features including resizing, renaming, cropping, color adjustment, watermarks, and a broad array of other image-managing features. It also provides quick access to EXIF information and a thumbnail browser via hidden toolbars that emerge when you touch the edge of your screen with the mouse.

FastStone Image Viewer also offers a batch-image converter and resizer, a magnifier, and a built-in slide show with more than 60 transitional effects, as well as lossless JPEG transitions, drop-shadow effects, image frames, scanner support, and a histogram. It supports all major graphic formats including BMP, JPEG, JPEG 2000, GIF, PNG, PCX, TIFF, WMF, ICO, and TGA. Supports PSD format, fixes bugs, and improves performance.