Icon Converter by RedKetchup is described as 'Convert PNG to ICO online - Convert images to compatible Windows icon files - Customize icons background and rounded corners'. There are more than 10 alternatives to Icon Converter by RedKetchup, not only websites but also apps for Mac, Windows and Linux. The best alternative is Zamzar, which is free. Other great sites and apps similar to Icon Converter by RedKetchup are Online Convert (Freemium), Convertio (Freemium), youconvertit (Freemium) and iConvert Icons (Freemium).
Free Online Icons Converter - Convert PNG to ICO and ICO to PNG files : Windows Vista compatible icons. ConvertICO.com is fast (you dont need to register or to install software) and easy to use (you need only 3 clicks to convert the PNG or ICO file).
ConvertICO.org is a free online portable icon conversion software and favicon generator, it allows to make a single or multiple-size icon from png, gif, jpg and bmp format, or extract all the frames inside an icon to separate images.