The RedKetchup - Icon Converter allows you to convert an image into a compatible Windows icon online. It can also customize the icon background with a color or adjust its rounded corners. Finally, it can configure the image format and the color depth used internally by ICO files.
Online Image Converter - Online Image Converter converts your BMP, JPG, PNG, GIF or ICO files quickly and easily.
theonlineconverter.com - Theonlineconverter.com is an online file conversion platform which offers a user-friendly, cross-platform online tools for user's diverse needs. It allows batch conversion of files and is completely free of cost.
Online Favicon Generator & Gallery - Online favicon generator & creator provides to convert image GIF, JPEG, PNG and download in favicon.ico format 16x16 or 32x32 pixels or HTML code. This website also has a fantastic favicon gallery with download.
iLovePDF - Free online PDF tool set
png2ico.com - Fully featured free online PNG, JPG, TIF, BMP & GIF etc. to ICO converter from sohOpen.
Convertio - File Conversion in the Cloud