Inspect an STL
No file to hand? Press one of the samples under the drop zone: a calibration cube, an open-top box, a mesh with a hole, a tall thin post or a large panel. Each shows a different part of the report.
- Choose an STL file, or drop it on the box. Binary and ASCII STL both work. The file is read on your device; nothing is uploaded unless you choose to keep it.
- Read the report: triangle count, size in X, Y and Z, volume, surface area and whether the mesh has holes.
- Check the weight in PLA. Change the infill to match what you'll print.
- Turn it around in 3D, or use Top, Front and Side for flat views with the sizes marked.
- Pick your printer to see if it fits, and download a 3MF set up for it (or an STL or GLB).
Saving a report
Name it and press Save report to keep the numbers. Tick Keep the original file to store the STL with it in your account (files up to 100 MB).
STL Inspector is part of the Commercial plan, or you can buy it on its own.
Last updated 2026-11-06