FastStone Image Viewer dapat menelusuri, mengkonversi, dan mengedit gambar dengan cepat dan mudah. Banyak fitur yang ditawarkan seperti image viewing, management, comparison, red-eye removal, emailing, resizing, cropping, retouching, color adjustments, dll. FastStone Image Viewer mendukung format gambar popular (BMP, JPEG, JPEG 2000, animated GIF, PNG, PCX, PSD, EPS, TIFF, WMF, ICO dan TGA)