How many files can I check at once?

The queue accepts up to 30 files. They are analyzed sequentially in one Worker, so the page stays usable while a large queue is running.

Does the batch checker upload my files or send them to a printer?

No. Every file is read locally with File.slice(); geometry analysis and report generation happen in this browser tab. There is no network upload and no printer connection.

Why is a wall-thickness result skipped for some files?

Wall analysis has a 200,000-triangle cap to keep a batch responsive. Large models still receive topology and bed-fit results, but the wall columns show skipped instead of a partial estimate.

What does Auto model units mean in a mixed-format batch?

Auto treats glTF and GLB as metres because those formats declare metres, and treats STL, OBJ, PLY and 3MF as millimetres. Choose a fixed unit if every file was exported in the same non-default unit.

Can I use the CSV or PDF as a production certificate?

No. The summary is a local geometric screening report. Confirm the model in the slicer with the exact printer, material and supports before production or delivery.

Do .gltf files need their .bin companions?

Yes when the glTF stores its buffer externally. Select the .gltf and all matching .bin files together; the checker matches them by the buffer URI and reports a missing companion instead of silently analyzing an empty model.

Print readiness/Checks

Batch printability check (local)

Check a queue of models for printability in one pass. Drop up to 30 STL, OBJ, PLY, 3MF, GLB or glTF files, optionally compare each one with a printer build volume, and get a per-file topology, wall-thickness and bed-fit summary. Every file is parsed sequentially in a Worker in this tab; nothing is uploaded.

ReadyNo uploadWorkerSTL · OBJ · PLY · 3MF · GLB · glTF

Tool facts

Formats: STL · OBJ · PLY · 3MF · GLB · glTF
Output: Report
Worker: Yes
Max file: 500 MB
Runs: in your browser

Why local

Batch printability check

No upload

Results

Add files, choose a printer and run the checks. Results stay in this tab.

Drop models to check

Add files, choose a printer and run the checks. Results stay in this tab.

Up to 30 files per batch.

Drop models to check

Add up to 30 STL, OBJ, PLY, 3MF, GLB or glTF files; .gltf files need their .bin companions. Files are checked one at a time in this tab.

Add files

Max file size: 500 MB · No upload

Target printerModel unitsXY clearance per side (mm)Thin-wall threshold

Checks run sequentially in a Worker; run again after changing settings. You can cancel the current file.

No upload · Worker

How it works

1
Add up to 30 mesh files. A .gltf can be selected together with its .bin companions.
2
Choose a target printer for bed-fit results, or leave the printer unset to check geometry only.
3
Keep model units on Auto for per-file defaults (metres for glTF/GLB, millimetres for other formats), or force one unit for the whole batch.
4
Set an optional thin-wall threshold and XY clearance.
5
Run the checks; files are processed one at a time with progress and cancellation.
6
Review the per-file topology, minimum wall, thin-wall area and bed-fit verdict, then download a CSV or PDF summary.

What the numbers mean

Topology

Manifold and watertight are reported from the same welded half-edge analysis used by the single-file checks. Files above the topology cap show not computed instead of a guessed result.

wall

Minimum and mean wall values come from one inward ray per triangle. Thin-wall area is the surface area below the chosen threshold. Models above 200,000 triangles skip wall analysis.

bed

Bed fit compares the scaled bounding box with all six axis-aligned orientations and removes the XY clearance from the usable area. It is a dimensional check, not a support or auto-placement recommendation.

Units

STL, OBJ, PLY and 3MF are treated as millimetres by default; glTF and GLB use metres because the format declares metres. Auto mode applies that default per file, while a forced unit applies to every file.

status

A completed row means the geometry analysis finished. It is not a slicer validation or a certification. Confirm the profile and supports in the slicer before production.

Export

CSV contains one row per finished file. The PDF is generated locally from the same rows and is intended as a printable triage summary.

Printing notes

Use the batch result to triage a folder, then open the individual printability report for any file that needs detail.
A file that fails topology or wall checks will not become printable just because the bed-fit column says Fits.
Fix units in the CAD export when an entire batch is 10×, 25.4× or 1000× off; forcing a unit can mask the real source problem.
For production approvals, keep the slicer preview and the material profile alongside this summary.

Questions

References

· ISO/ASTM 52900 additive manufacturing terminology
· Triangle mesh topology and manifold edge definitions
· glTF 2.0 specification: metres and external buffers