Recalculate Normals

Recompute smooth/flat normals for better lighting.

Recalculate Normals

Recompute smooth/flat normals and preview lighting.

Drop 3D model here or click to choose

Related tools

GLB Preview

Preview GLB/GLTF models with wireframe and auto-rotate.

Model Transform

Scale, rotate and translate a model, then export OBJ.

Model Info

Inspect model size, meshes and bounding box.

Primitive Generator

Generate simple 3D primitives and export OBJ.

Model Colorize

Apply a solid material color with metalness and wireframe.

Heightmap Mesh

Turn a grayscale image into a simple terrain mesh.

Model to STL

Convert GLB/GLTF/OBJ to Binary or ASCII STL.

OBJ Viewer

Local preview for Wavefront OBJ meshes.

FAQ

Flip normals?
Recalculate first; flip can come later.
STL ok?
Yes.
Local?
Yes.

Recalculate Normals · 无极工具 2026

Recompute smooth/flat normals for better lighting.

What can it do?

  • Smooth normals
  • Flat normals
  • Lighting preview
  • Export OBJ

Why choose this tool?

  • Fix dark faces/lighting
  • Preprocess before import
  • Instant local

How to use?

  1. Upload model
  2. Choose smooth/flat
  3. Recalculate and download

Related tools

GLB Preview · Model Transform · Model Info · Primitive Generator · Heightmap Mesh · OBJ Viewer