PicFont is an image editor which lets you insert text or comments on photos. You can normally do them in a desktop image editor installed in your computer. The only difference with PicFont is that the editing is done online. You can either upload from your computer or grab a photo online.
There are other online editing tools which does the same job and more but with limited fonts styles. PicFont is only focused on placing text on your images. Just place in a text, choose a font, size and color and drag it around the photo. You can also rotate the texts that you inserted. There is also a preview feature which allows you to see the photo in different sizes and download it in the same manner.
PicFont is great for grabbing photos online and inserting comments without having to download the photo and edit it in your resident photo editor. If you are looking for a quick way to place text(s) on images online, PicFont is a great place to start. It may not give you the full editing power of a normal desktop editor but it will surely do the job in adding texts and comments on a photo/image.