Engineering

3D Lab Viewer mesh repair panel showing a before/after watertight diff – Watertight No to Yes

Repair STL Meshes Online – Fix Holes, Flipped Normals & Make Watertight in Your Browser

Fix broken STL files without desktop software. 3D Lab Viewer now diagnoses and repairs non-watertight meshes – weld vertices, fill holes, fix flipped normals, and remesh into a solid – all locally in your browser.

3D Lab Viewer bounding box around a 3DBenchy showing X 60mm, Y 31mm, Z 48mm dimension labels

Bounding Box in 3D Viewer – See Model Dimensions Instantly Online

Instantly see your 3D model’s length, width, and height with our bounding box tool. Check print size, verify scale, and ensure fit – all in your browser, no software needed.

3D Lab Viewer measuring tools interface showing point-to-point measurement

3D Model Measurement Tools – Online Point-to-Point, Face & Diameter Calculator

Measure distances, areas, and diameters directly in your browser. No CAD software required – just upload an STL, STEP, or OBJ file and get precise measurements instantly.