IrfanView is, without a doubt, one of the most popular graphic viewers that exists, capable of reading many different graphic formats. In addition, it also has the function of converting any image to other formats.
This IrfanView Shell Extension is a DLL library that will allow you to call some of the Irfanview functions directly from Windows Explorer. For example, you can convert to other formats, such as GIF, JPG, BMP, PNG, TIF, SWF, and so on; create thumbnails of the images; make graphic presentations, etc.
The IrfanView Shell Extension library is totally free.
You can free download IrfanView Shell Extension 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.