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| Name | CUR | PNG |
| Full name | CUR - Microsoft Cursor Icon | PNG - Portable Network Graphics |
| File extension | .cur | .png |
| MIME type | image/png | |
| Developed by | Microsoft | PNG Development Group |
| Type of format | Graphics file format for mouse cursors | lossless bitmap image format |
| Description | The ICO file format is an image file format for computer icons in Microsoft Windows. The CUR file format is an almost identical image file format for non-animated cursors in Microsoft Windows. | Portable Network Graphics (PNG) is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for Graphics Interchange Format (GIF), and is the most used lossless image compression format on the Internet. PNG itself does not support animation at all. MNG is an extension to PNG that does; it was designed by members of the PNG Group. |
| Technical details | The only differences between ICO and CUR file formats are the bytes used to identify them and the addition of a hotspot in the CUR format header; the hotspot is defined as the pixel offset (in x,y coordinates) from the top-left corner of the cursor image where the user is actually pointing the mouse. | PNG supports palette-based images (with palettes of 24-bit RGB or 32-bit RGBA colors), grayscale images (with or without alpha channel), and full-color non-palette-based RGB[A] images (with or without alpha channel). PNG was designed for transferring images on the Internet, not for professional-quality print graphics, and therefore does not support non-RGB color spaces such as CMYK. |
| Associated programs | Windows Explorer | Adobe Photoshop, Paint Shop Pro, the GIMP, GraphicConverter, Helicon Filter, ImageMagick, Inkscape, IrfanView, Pixel image editor, Paint.NET, Xara Photo & Graphic Designer. |
| Wiki | https://en.wikipedia.org/wiki/ICO_(file_format) | https://en.wikipedia.org/wiki/Portable_Network_Graphics |