Finding 01 · Diagnostic note
Mesh issue count
No core V1 mesh issue found in this sample.
Safe preview
STL dimensions and size
Check STL size, dimensions, and triangle count in one report.
Use the current mesh analysis to inspect bounding box size, triangle count, format, and repair risk before sending a model to a slicer.
- Bounding box dimensions
- Triangle count and format
- Mesh health with size context
Check STL sizeBrowser-local first pass
Diagnostic bench
Upload an STL to check dimensions
The checker parses your STL and reports bounding box size, triangle count, format, and issue families from the same workflow.
Check STL size0 critical
Finding 02 · Diagnostic note
Scale review
Units are not stored in STL, so final unit choice stays manual.
Report only
Inspection focus
Dimensions without inventing unsupported features
This page uses the existing bounding box and triangle-count analysis. It does not add unit conversion or slicer simulation.
- Check whether bounding box dimensions look plausible.
- Use triangle count to spot unusually heavy files.
- Pair size review with mesh health before print setup.
Repair boundary
What the size checker can and cannot know
STL files do not store real-world units. The checker reports numeric bounding box dimensions, while unit interpretation stays with the user.
Supported
- Bounding box size from parsed vertices
- Triangle count and STL format
- Mesh issue report in the same workflow
Report only
- Millimeter vs inch auto-detection
- Wall thickness simulation
- Printer build-volume guarantee
FAQ
Questions before the next print
Can this check STL dimensions?
Yes. It reports the bounding box size from parsed STL vertices along with triangle count and mesh issue data.
Does STL store units like millimeters or inches?
No. STL stores coordinates but not units, so the checker reports dimensions without guessing the intended unit system.
Can triangle count affect printing?
Very high triangle counts can slow slicers or indicate noisy exports. The checker reports the count so you can review it early.
Related diagnostics
Continue the diagnostic path
01
Free STL Checker
Upload an STL file to check mesh health, open-boundary hole signals, non-manifold edges, triangle counts, dimensions, and repairability.
02
STL Repair Online
Repair STL files online with a browser-local checker, safe repair preview, and report-only boundaries for open edges and non-manifold geometry.
03
Fix STL File Issues
Find why an STL file fails in a slicer and preview safe fixes for duplicate faces, degenerate triangles, and normal mismatches.