Nova Skin vs PMCSkin3D

Nova Skin is a browser-based tool for creating and editing Minecraft skins. You can paint on a 3D model, letting you see the skin on a character as you work. It supports the Slim (Alex) model and can load a skin by username. The model can also be posed and animated, adding ways to view a skin beyond a static preview. The listed workflow stays in a browser: open Nova Skin, load a skin by username if needed, then paint on the 3D model and use its posing or animation features. Nova Skin is free to use, and a free plan is listed. It runs on Browser; no other platform is specified.

PMCSkin3D is a browser-based editor for creating and adjusting Minecraft skins. It lets you paint on a 3D model and inspect the skin on that model as you work. The editor supports HD skins and both the standard and Slim (Alex) models. You can load a skin by username, then pose and animate the model to view it in different positions. These tools keep the focus on making changes to a skin and seeing how it appears on a model. PMCSkin3D runs in a browser and is free to use, with a free plan. Its website is the Planet Minecraft skin editor page. No desktop or mobile app is listed; the stated platform is the browser. For people who want to work on Minecraft skins without paying, its listed features include model painting, HD skin support, model selection, username loading, posing, and animation.