Meshdiff lets you compare 3D model versions in your browser — files never leave your machine

Meshdiff – visually compare two STL versions in the browser, client-side

Meshdiff is a free, client-side tool for visually diffing STL, 3MF, and OBJ files. It parses files locally, so nothing is uploaded. The current version offers voxel-based diffing with adjustable tolerance, volume delta metrics, and a JSON diff report. A beta surface-mode heatmap and ghost overlay are in the works, with auto-alignment, cross-sections, and shareable URLs on the roadmap. The creator emphasizes a static-first approach, ensuring privacy for design reviews.