Features
Everything you need
to catch what changed.
No CAD plugin, no manual overlay, no guesswork — Meshdiff reads two STL, 3MF, or OBJ files and gives you a real diff. Compare STL files, run an OBJ diff, or compare two 3D models of any format side by side.
See every change, not just a file size.
Both meshes are voxelized into a shared grid and compared cell by cell — added geometry in green, removed in red. No manual overlay, no guessing what moved.
- Computed off the main thread, never freezes the viewer
- Works on STL, 3MF, and OBJ
- Adjustable tolerance for press-fit vs. clearance
See exactly how far a surface moved.
A per-vertex signed-distance overlay shows dimensional drift as a gradient, not just a bounding-box number.
- BVH-accelerated nearest-point sampling
- Green = pushed out, red = pulled in
- Ghost overlay catches fully-removed material
Catch a failed print before you start it.
Real wall-thickness, overhang, and unsupported-area analysis on every version — not a placeholder checkbox.
- Pass / Warn / Fail gate, tuned for FDM
- Flags walls under 0.8mm
- Flags unsupported overhangs past 45°–55°
Send a diff, not a 40MB attachment.
One link reproduces the exact comparison — same alignment, tolerance, and view — for anyone, no account or install required.
- 1, 3, or 7-day expiry
- No signup for the recipient
- Free on the Community plan
Leave feedback right where it matters.
Click anywhere on a model to pin a comment to that exact 3D point, not a vague line number or a screenshot.
- Comments stay attached to the surface
- Full history in the Projects workspace
Every upload keeps a real trail.
A traceable version history with team review — pending, approved, or rejected — before a file becomes the stable version everyone builds on.
- Team approval workflow (admin / approver roles)
- Rejection reasons kept on record
- Stable-version resolution for downloads
Free forever — no account, no install.
The full diff engine is free for anyone. Drop two files into the browser tool and get a real comparison — no signup, no credit card, and nothing leaves your machine unless you choose to share it.
- Compare STL, 3MF, and OBJ files, unlimited
- Measure distances and radii right in the viewer
- No account needed to use it
Ready to see what changed?
Drop two files into the free diff tool — no account, nothing leaves your browser.
Open the diff tool