[1][2][3] Sumopaint has web-based "paint" features similar in some respects to Pixlr.
[8] Like Photoshop, it has layering capability, image adjustment tools such as changing the color balance, options for blending images, shadows and bevels, filters such as sharpening and blurring.
[9] Reviewer Kris Fong of MacWorld magazine described some "quirkiness with certain tools and layers" and noted that it only works with certain file formats such as JPEG, PNG and GIF formats, and only allows users to save images in the JPEG and PNG formats,[9] as well as an internal file format called Sumo files.
There is a paid professional version of the software called Sumo Pro which activates features such as a downloadable version of the software.
The original version, "Sumo Paint" was written with Flash.