A favicon (short for favorites icon) is a square icon displayed in the browser’s address bar and the bookmarks. As per Wikipedia, there are three sizes for favicons: 16×16, 32×32 and 64×64, but in fact, the standard and most common size is 16×16.
A favicon to a website is just as a trademark to a company, that’s why people care about it. The easiest way to create a favicon is to convert any of your image to an ico file, and below 10 websites are available for you to do that online for free:
1. Dagon Design Favicon Generator Tool
Dagon Design Favicon Generator Tool lets you upload a JPG, PNG, or GIF image and easily convert it to a standard 16×16 favicon.ico file. The max size of image you can upload is 100 KB.
Favicon.ru is workable for BMP, JPG, GIF or PNG format images, which size should not exceed 300 KB. Besides uploading an image from your computer, you can also enter an image url from the internet. The image can be cropped, and the favicon also can be edited.
3. Dynamic Drive FavIcon Generator
Dynamic Drive FavIcon Generator supports BMP, JPG, GIF or PNG format image, which size should not exceed 150 KB.
4. FavIcon from Pics
FavIcon from Pics also supports BMP, JPG, GIF or PNG format images, but It seems no size limit for the image you can upload. Besides an ico file, FavIcon from Pics also generates an Animated GIF file, which can be edited.
5. Favicon Generator & Gallery
Favicon Generator & Gallery says it will allow you to generate a favicon.ico file from any image on your computer, but it doesn’t say how large an image you can upload.
Faviconr can make favicons from JPG, GIF, or PNG files, and the maximum image file size is 150 KB.
Favikon supports PNG, GIF, or JPEG format images, which can be uploaded from your computer or fetched from a url, and the maximum size of the image can be 5MB.
8. Free Favicon
For Free Favicon, the supported image formats includes GIF, JPG and PNG, but the supported largest image size is unknown. Besides an ico file, there is also an animated GIF file generated.
Genfavicon supports JPG, GIF and PNG format images, the maximum size of the image is 4 MB. You can input an image url or download an image from your computer. The image can be cropped, and the favicon can be downloaded in 5 different sizes.
10. Web Script Lab Favicon Generator
Web Script Lab Favicon Generator lets you upload an image in JPG, GIF, PNG or BMP format, the image size should be no larger than 150 KB. And the favicon size can be 16×16 or 32×32.
Regarding the size of a 16×16 favicon created by the above 10 websites, it is about 5 KB created by FavIcon from Pics, and it is about 1 KB created by the other 9 websites. Except favicon size, there are no other obvious quality differences among these 10 websites.