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

Meshdiff is a client-side web app that compares two STL, 3MF, or OBJ files directly in the browser.

It uses voxel-based diffing to highlight added and removed material and shows volume change metrics.

All processing runs in a Web Worker, so users avoid server uploads while keeping the workflow fast and private.

The tool is useful for 3D printing and CAD users who need to inspect changes between messy mesh revisions.