FastStone Image Viewer is a free image browser, viewer, converter and editor that supports all major graphic formats. Other features include a batch image converter / resizer, a Full Screen image viewer with Select-Zoom support, a clear magnifier and a slideshow with 150+ transitional effects.

Main Features:
- Common image formats support, including loading of JPEG, JPEG2000, GIF, BMP, PNG, PCX, TIFF, WMF, ICO, CUR, TGA and saving to JPEG, JPEG2000, TIFF, GIF, PCX, BMP, PNG, TGA
- Digital camera RAW formats support, including CRW, CR2, NEF, PEF, RAF, MRW, ORF and DNG
- Full screen viewer with Select - Zoom support
- Crystal clear and customizable magnifier
- Resizing, flipping, rotating, cropping, emailing and color adjusting tools
- Powerful crop-board that crops images into pre-defined and customized print sizes
- Image EXIF metadata support
- Batch image converter/resizer
- Slideshow with 150+ transitional effects and MP3/WAV/MIDI/WMA background music support
- Compare images side by side
- Undo, Redo and Mouse Wheel support
- Image Annotation (text, arrowed line, watermark etc.)
- Simple and effective red-eye removal
- Much more