When comparing Irfanview vs Greenshot (for Windows), the Slant community recommends Greenshot (for Windows) for most people. In the question“What are the best screen capture tools for Windows?” Greenshot (for Windows) is ranked 2nd while Irfanview is ranked 8th. The most important reason people chose Greenshot (for Windows) is:
Greenshot is licensed under GPL with source code available on [BitBucket](https://bitbucket.org/greenshot/greenshot).
Ranked in these QuestionsQuestion Ranking
Pro Some editing tools included (cropping, color correcting, etc...)
Pro Lots of plugins available
Plugins can be found here.
Pro Batch processing
Even exif information can be batch processed.
Pro You can just scroll with your mouse to explore images
Pro Recognizes virtually any image format
Pro Ultra fast
If you press and hold the right-arrow button (for displaying the next image), you can watch images pass by as if they are a video, it's that fast. No stuttering, it loads images as fast as your hard drive can keep up.
Pro Can use 8bf (Photoshop) filters
Pro Free and open source
Greenshot is licensed under GPL with source code available on BitBucket.
Pro Can capture an entire webpage
Instead of just capturing the visible portion of the page, this tool can capture all of the page in one image by scrolling through the page, taking images at set points and then stitching the images together.
Pro Allows annotating, highlighting and obfuscating screenshots
Pro Freezes screen when you capture
When you enter a capture mode, the screen content is preserved as it was when you started capturing.
Pro Can be quickly invoked with the print screen button
Pressing the print screen button will allow you to select the captured area.
Pro Classic UI design makes it easy to use.
Pro Selecting custom rectangle is the default
Easy to use selection tool with a magnifier to select only the part of the screen that you need.
Con UI is far from ideal
Sometimes the interface is confusing.
Con Windows only
Con GIF viewing is buggy
GIF viewing has longstanding problems like flickering, incorrect framerate or artifacts, and it is very unlikely that it will be ever fixed.
Con Preferences are hard to find
Con This version only works on Windows, not Linux nor Mac
However, the same author now has a separate version of Greenshot for iOS, which is available (for a small fee) in the Mac App Store at https://itunes.apple.com/us/app/greenshot/id1103915944