When to use this tool
You already have an exported STL/OBJ and want a quick check for holes, non-manifold geometry and thin walls. For a part from scratch or professional repair, use 3D modeling; for file requirements see make a 3D file printable.
← Tools · Mesh analysis · Italiano
CHECK AN STL FILE ONLINE
Version BETA
Free tool to check an STL before 3D printing: size in mm, wall thickness, open meshes, and Castalia build-volume fit. No software to install — upload, verify, download.
- 1 Upload
Drop the STL into the large panel below, or click to pick a file from your computer.
- 2 Check size
Dimensions are in millimeters. Use the slider or X/Y/Z fields to scale the part up or down.
- 3 Read the colors
green ok · yellow thin · red print risk. The badge at the top left summarizes pass/fail.
- 4 Volumes & download
At the bottom of the viewer: FDM / Resin / MJF / Metal tiles show whether the part fits or exceeds max build volume (90° rotations). If there are holes: “Repair mesh”, then “Download STL”.
Workspace
Your model
Drop an STL into the panel. Mouse: orbit · wheel: zoom · right-click: pan.
Orientation
What this mesh analysis checks
Before printing or requesting a quote: mesh closure, millimeter scale, risky wall thickness, and envelope fit vs FDM, resin, MJF and metal volumes.
Machine volumes (reference)
FDM: 250×250×250 mm. Resin: 353×196×350 mm. MJF: 380×284×380 mm. Metal: 140×140×140 mm. Larger parts can be split and reassembled.
FAQ
- What is STL mesh analysis for?
- To verify before printing (or quoting) that the file is closed, sized in millimeters, free of critically thin regions, and that the envelope fits Castalia machine volumes.
- Does my file leave my computer?
- No: analysis runs in the browser. You download a repaired STL only if you choose to. For critical parts or complex repair, professional 3D modeling remains available on quote.
- Which print volumes does the tool compare?
- FDM: 250×250×250 mm. Resin: 353×196×350 mm. MJF: 380×284×380 mm. Metal: 140×140×140 mm. Larger parts can be split and reassembled.
Service
Need more than the tool?
Still-critical mesh, complex holes or a delicate technical part: we repair it via 3D modeling (quoted work, not included in the tool). Then continue to the online quote.