Drop in an STL and get the same printability checks the Supra desktop app runs: overhangs, wall thickness, build-volume fit, and a support estimate. Free, no account, and nothing is stored.
or drop one here · up to 4MB · nothing is stored
Will it need supports?
Measures the share of surface area pointing downward more steeply than 45°, and does it for all six axis orientations rather than only the one you modelled in. A lid modelled right-side-up looks terrible and prints perfectly upside down, so the verdict comes from the best orientation and the as-modelled number is reported beside it.
Is anything too thin to print?
Samples 1024 points across the surface, casts a ray inward from each, and reports the 5th-percentile thickness against a two-perimeter minimum for a 0.4mm nozzle. It is a sampled estimate and can miss a thin rib the sampling did not land on, which is stated in the result rather than in a footnote.
Does it fit on the plate?
Compares the bounding box against a 220 x 220 x 250mm envelope. Your printer may differ, so the envelope used is recorded with the result.
Roughly how much support material?
Projected area under overhangs times mean column height. This is returned as DEFERRED rather than as a number you should trust, because it is not a slicer estimate and a slicer will tell you properly.
Supra runs fifteen check families against a part. Eleven of them need to know what the part is for: how hard it gets loaded, how much heat it sheds, which fasteners go through it, what it has to mate with. An STL carries none of that, so those checks are not run here and the result marks them deferred by name rather than leaving them out.
That distinction is the point. A check that was skipped and a check that passed look identical when the only thing you are shown is a green tick, and the difference between them is exactly where a part goes wrong.
Supra for the desktop runs all fifteen, against the spec it built the part from, with no upload limit because it never uploads anything.
If what you came for was the fastener side of that, the ISO 273 clearance hole table is published here in full, with the standard’s own caveats.