• Many supported file formats
• Multi language support
• Thumbnail/preview option
• Paint option - to draw lines, circles, arrows, straighten image etc.
• Toolbar skins option
• Slideshow (save slideshow as EXE/SCR or burn it to CD)
• Show EXIF/IPTC/Comment text in Slideshow/Fullscreen etc.
• Support for Adobe Photoshop Filters
• Fast directory view (moving through directory)
• Batch conversion (with image processing)
• Multipage TIF editing
• File search
• Email option
• Multimedia player
• Print option
• Support for embedded color profiles in JPG/TIF
• Change color depth
• Scan (batch scan) support
• Cut/crop
• IPTC editing
• Effects (Sharpen, Blur, Adobe 8BF, Filter Factory, Filters Unlimited, etc.)
• Capturing
• Extract icons from EXE/DLL/ICLs
• Lossless JPG rotation
• Many hotkeys
• Many command line options
• Many PlugIns
• Only one EXE-File, no DLLs, no Shareware messages like "I Agree" or "Evaluation expired"
• No registry changes without user action/permission!

New PlugIn: Paint (Edit menu, Hotkey: F12). It allows IrfanView to paint lines, circles, arrows, straighten image etc.
Support for embedded color profiles in JPG/TIF (Properties->Viewing).  LCMS PlugIn.
New command line option: /advancedbatch (Apply advanced batch options to image). Allows many image operations, add text etc.
Lossless JPG Crop added (Menu: Options or Thumbnails (batch mode)).
Added option to tag/mark files during browsing (window or fullscreen mode):  Hotkeys: X = tag file, SHIFT+X = untag file, SHIFT+Q: show tagged files in Thumbnails.
Support for FLV format (Flash PlugIn).
Histogram feature added (Menu: Image, Hotkey: SHIFT+H).
- Zoom calculation changed: relative, based on previous zoom value.
- Auto adjust colors works with selections.
- Option to save values from Enhance Colors dialog.
- New effects added: Green and Yellow eye reduction (Effects browser dialog).
- Option to keep current scroll position for the next image (Menu: View).
- Support for HDP/WDP format (MS HD Photo, PlugIn).
- Save support for JNG format.
- New GUI for batch/slideshow dialogs.
- Custom selection dialog uses current selection at start, if available.
- New compression options in PDF export.
- New loading options for normal RAW files.
- Fullscreen options can be changed during fullscreen mode.
- Browsing: if CTRL pressed, the file index increases/decreases by 5 (default: 1).
- 3 external editors are possible now (Properties->Misc 3).
- New option for Import palette: Use nearest color (Properties->Misc 3).
- Changes in print option Scale (original image size is used as input).
- New print option for multipage images: Print odd or even pages.
- Some changes/optimizations in HTML templates.
- CTRL+A selects the whole image in the main window.
- Several PlugIns are changed/updated.
- Some bugs fixed (IFF/PCX/JP2 loading, GIF animations, Palette import).