3D Mesh Resizer & Converter

3D Mesh Resizer & Converter

Conversions remaining: 5 / 5
1 Upload
2 Configure
3 Convert
📦
Drop your .PLY or .STL file here
or click to browse
3D Preview
Upload a 3D scan to preview
Supports .PLY and .STL formats
Original Model Info
Vertices
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Faces
—
Bounding Box (W × H × D)
—
Watertight
—
File Size
—
Show all metrics ▼
Surface Area
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Volume
—
Mesh Density
—
Longest Dimension
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Center of Mass
—
Uploaded Model Opacity 100%
Aligner Shell Opacity 60%
Converting…
Professional Fit Preview
Shell Opacity 60%
FIT STATUS
No offset selected. Original size will be exported.
Original vs Converted Comparison
Metric Original Converted Delta
Session History
# File Offset Original Size Converted Size Time Download
Debug Log ▼

How to Use

1

Upload Your 3D Scan

Drag and drop a .PLY or .STL file onto the drop zone, or click to browse. The model loads instantly with a real-time 3D preview you can orbit, zoom, and pan.

2

Choose Shrinkage Mode

Percentage (%) scales the model uniformly toward the center — good for quick adjustments. Uniform (mm) pushes every surface inward by the same distance along its normal — the clinical standard for consistent aligner fit. Use the Force Guide tooltip to pick the right offset (0.10 mm recommended).

3

Convert & Download

Click Convert & Download STL. The app generates a binary STL of the shrunk model and downloads it automatically. A dual-layer preview shows the original tooth (blue) with the aligner shell (gray) overlaid.

4

Analyze the Result

Use the clinical tools to verify your conversion:

Heatmap — color-coded surface deviation map showing exactly how much each point moved.
Measure — click any two points on the model to measure distance in mm.
Comparison Table — side-by-side original vs converted metrics with delta values.
Screenshot — capture the 3D view with metadata overlay for patient records.

5

Fabricate Your Aligner

3D print the downloaded STL model, then thermoform your clear aligner sheet over it. The precisely shrunk model ensures the aligner fits snugly and applies the correct amount of force for tooth movement.

View Full Documentation →
Before / After Comparison