PmxEditor

PmxEditor (PMXエディタ) is the reference editor for PMX and PMD model files used in MikuMikuDance. Created by Japanese developer Kyokuhoku-P, it lets you configure, optimize, and modify the internal structure of 3D models.

Unlike Blender, PmxEditor focuses on the MMD-specific aspects of a model: bone weights, morphs, physics bodies, joint constraints, and display frames. It complements Blender's MMD plugin for mesh and weight work.

The recommended version for English speakers is PmxEditor v0273 (2022 unofficial translation by johnwithlenon), which includes translated default plugins.

System requirements: Windows 10/11, DirectX 9, .NET 4.8 and VC++ 2022 (usually pre-installed). MmdStart can install it automatically.