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Reduce an STL for Sculpteo

Sculpteo's uploader stops at 50 MB and one million polygons. A binary STL reaches one million triangles at about 48 MB, so the two limits line up and a file just under 50 MB can still be over the polygon count. The reducer opens here at 45 MB, which clears both.

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Drop an STL file here or click to browse
Up to 300 MB · .stl only
Choose STL file
1
Upload STL
2
Set target MB
3
Download
MB
1 MB500 MB

We aim for exactly this size. Quality-preserving quadric decimation stops as soon as the file fits. If the mesh cannot be reduced further without breaking, we return the smallest safe result.

Pick an STL file to continue.
🔒 Files are processed on our server in isolated memory and removed within 15 minutes of your download.

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The limit: Sculpteo

File size cap
50 MB
Triangle cap
1,000,000
Triangles at that size
1.05 million

This page opens the reducer at 45 MB. Source: Sculpteo help centre (checked 2026-09).

Why the file is over it

Files sent to a printing service are usually the final, highest-resolution export, because nobody wants to lose detail on a paid print. That is the wrong instinct for size: a 0.1 mm layer cannot reproduce triangles smaller than the layer, so a scan at 3 million triangles carries two thirds of its data below what SLS or resin can render.

How to get under it

  1. 1Drop the STL below. The target is preset to 45 MB.
  2. 2Press Reduce. The result card reports the triangle count; it will be under one million at this size.
  3. 3If Sculpteo's price seems high, reducing further does not lower it: cost depends on volume, not triangles.
  4. 4Download and upload to Sculpteo.
Reduce for Sculpteo (target 45 MB)

What to expect

A 120 MB export (2.5 million triangles) to 45 MB keeps about 940,000 triangles. Fine texture on organic models softens slightly; edges on mechanical parts stay sharp because the algorithm removes triangles from flat regions first.

Other ways

Sculpteo's own site offers repair but no simplification. Netfabb and Meshmixer used to be the standard answer; Meshmixer is discontinued and Netfabb's free tier is gone, which is why most guides now point to Blender's Decimate modifier.

Questions

Why is a 49 MB file rejected?

The polygon cap. One million triangles is about 48 MB of binary STL; an ASCII STL hits the size cap far earlier. Convert to binary and stay under 45 MB.

Does reducing change the quoted price?

No. Sculpteo prices by material volume and bounding box. The reducer does not change the volume in any measurable way.

Should I reduce a file meant for SLS differently?

No special settings are needed. SLS resolution is around 0.1 mm; the tool's quality-preserving collapse stays well above that at 45 MB for any model that fits on a desktop printer.