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Reduce a Tripo STL for 3D printing

Tripo's Best Quality export has been measured at 1,911,270 faces, about 91 MB of STL, and frequently arrives non-watertight; its Smart Mesh option caps at 50,000 triangles but changes the surface. This page opens the reducer at 30 MB and repairs the mesh first, so the model slices as generated.

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Drop an STL file here or click to browse
Up to 300 MB · .stl only
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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: Tripo

File size cap
no fixed cap
Triangle cap
no fixed cap
This page opens the reducer at
30 MB

This page opens the reducer at 30 MB. Source: Tripo export formats guide (checked 2026-09).

Why the file is over it

Tripo reconstructs a surface at uniform density, so a 100 mm figure gets the same triangle spacing on its back as on its face. That is 20 to 40 times what a 0.2 mm nozzle can reproduce. The generator also leaves small holes and self-intersections where views disagreed, which is what slicers flag.

How to get under it

  1. 1Export from Tripo as STL at the quality you want, then drop it below. The target is preset to 30 MB.
  2. 2Press Reduce. Repair runs first: open edges are closed and non-manifold vertices separated; then decimation removes the triangles flat regions do not need.
  3. 3Read the result card: triangles before and after, and watertight before and after.
  4. 4Download and slice.
Reduce a Tripo model (target 30 MB)

What to expect

A 91 MB Tripo export (1.9 million faces) to 30 MB keeps 630,000 triangles. On a 120 mm figure that is one triangle every 0.15 mm, below the layer height of any FDM print. Going to 15 MB is usually still identical in the print and halves the slicing time.

Other ways

Tripo's Smart Mesh retopologises to 25,000 quads, which is great for animation and too coarse for a detailed print. Blender's Decimate keeps the surface but does not repair; run a repair pass separately if you go that way.

Questions

The result card says repair was applied. Did the model change?

Only the defects: triangles with zero area are removed and open edges closed. No vertex is moved, so the shape is the one Tripo generated.

Which Tripo export should I use?

STL at the highest quality; reduce here with a size target. Exporting lower quality from Tripo throws away detail everywhere, including where you wanted it.

Can I keep the colours?

Not in STL. For a colour print export GLB or OBJ from Tripo for the slicer and use the reduced STL where a single-material file is needed.