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.
Nothing you drop into Version A or B is uploaded anywhere.
- agys
A nice feature to add could be a synchronized transform: when rotating one viewport the other two rotate along (optional).
- progbits
Looks handy. Feature suggestion: locked views so all three viewports rotate together.
- sota_pop
Very cool work! Nice job. Road-map looks good too! I always appreciate client/local-first emphasis. I have been seeing a lot of great in-browser apps coming out via 3js,wasm,etc (THANK YOU LLMs)
With interest in this space you may be interested to check out:
- That Open Company in the BIM industry (not personally affiliated, but admirer).
- Fovea ArchVision (also not directly affiliated, but can attest that the team are great people.)