ConvertICO.org is a free online portable ico converter and favicon generator, it allows to create a single/multiple-resolution icon from png, gif, jpg and bmp format, or extract all the frames inside an icon to separate images.
Select the input file
Upload a file( png, ico, jpg, gif or bmp ) from your computer( maximum size: 2MB ):
Or get an image from the Internet:
Select the output icon type
ICO for Windows 7, Vista and newer( it's compatible with Windows XP )
ICO for Windows XP and older
Favicon for your website
Custom dimensions( Original size Multi-size in one icon )
16 x 16
24 x 24
32 x 32
48 x 48
64 x 64
96 x 96
128 x 128
192 x 192
256 x 256
Select the output image format
PNG JPG GIF BMP
Download the converted files
Select an input file and choose a profile for the output file, press the "Convert Now!" button, then the output files will be shown here.
Tips
This online ico converter supports multiple image formats / sizes / color depths / profiles. It can create a Windows 7/Vista style icon which contains the compressed PNG image while still works on Windows XP. It also allows to extract all the pictures in a multi-size( 16x16 to 256x256 pixels ), multiple color depths( 32 bits/pixel PNG[ RGB+Alpha ], 32 bits/pixel[ bmp ], 24 bits/pixel, 8 bits/pixel, etc. ) icon to png/jpg/gif/bmp images.