“Editor” is much like a basic graphics program, but this one runs from your browser. You can import one of you own photos or open a new file. I like how you options on what file extensions you would like to save as.
With “Express” you have a lot of options for simple photos editing, cropping, change saturation, color editing, borders, filters, overlays, text (with cool font options), stamps, and you can also create collages. (“Express” is my personal favorite.)
Pixlr Express is also a FREE mobile app and is on both Google Play and the App Store.
The “O-Matic” is the most basic service that pixlr provides. You are able to add filters and overlays to your photos. The “O-matic” also has ads on the sides that can get frustrating but other than that it works great.