Free 3D cleanup tool

Free Voxel Remesh Online

Drop an AI-generated model or a scan and get back one watertight surface built from scratch: no internal faces, overlaps or holes up to the size you choose, then reduced to the triangle count you pick. Compare the topology in wireframe, then download GLB, OBJ or STL. Free, and the file stays on your device.

Watertight result, checked
Internal faces removed
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GLB, OBJ or STL out

By SupaVoxel Team·Updated October 2026

How to remesh a model in 3 steps

01
Drop the model
Drag a GLB, OBJ, FBX, glTF, STL, 3MF, PLY, USDZ, DAE or STEP file onto the tool above, up to 200 MB. Try a sample loads a 500,000-triangle AI-generated bust, a typical case of a dense mesh with a messy inside.
02
Set detail, holes and budget
Detail sets how many voxels fit across the model's longest side, from 48 to 256 (default 128); the panel shows the resulting voxel size. Smoothing runs 0 to 10 passes. Close holes picks Cracks, Small holes or Large holes. Triangles caps the result at All, 100k, 50k, 20k or 5k.
03
Remesh, compare, download
Click Remesh. You get triangles before → after, a watertight check, the voxel surface size before reducing and how many floating specks were removed. Turn on Wireframe and switch Original / Result to compare topology, then download GLB, OBJ or STL.

What a voxel remesh does to your mesh

Remeshing doesn't edit the triangles you have. It throws them away and builds a new surface around the volume they enclose.

Voxelize the shape

The surface is measured on a 3D grid, and every voxel close to it is marked as wall. Gaps narrower than the Close holes setting are bridged.

Fill the inside

Everything the outside can't reach is solid. Internal faces, overlapping parts and hidden inner shells end up inside the solid and vanish.

Trace a new surface

Marching cubes traces one closed surface along the solid's boundary, so every triangle is about one voxel in size.

Smooth without shrinking

Taubin smoothing removes the stair-step pattern of the grid while keeping the volume, unlike plain averaging, which makes models thinner.

Reduce to a budget

meshoptimizer collapses edges until the triangle budget is met, keeping more triangles where the shape curves, and the tool then checks that the result is still closed.

Runs on your device

The whole remesh runs in a Web Worker inside the page, so the tab stays responsive and nothing is uploaded.

Remesh settings and what to pick

Defaults: 128 voxels, 3 smoothing passes, Cracks, 50k triangles and speck removal on.

Detail

Range: 48 to 256 voxels across
When to change it: Raise it for fine detail such as fingers, text or jewellery. Anything thinner than about one voxel disappears. 256 gave a 523,000-triangle surface on our sample before reducing

Smoothing

Range: 0 to 10 passes
When to change it: 0 keeps the voxel steps, 3 removes them, higher values soften sharp edges

Close holes

Range: Cracks, Small holes, Large holes
When to change it: Seals holes up to about 1, 4 or 8 voxels across. Raise it for scans with open patches; it also merges parts that nearly touch

Triangles

Range: All, 100k, 50k, 20k, 5k
When to change it: All keeps the full voxel surface. 50k suits printing and sculpting; 20k or 5k suit previews and web

Remove floating specks

Range: On or off
When to change it: Drops separate pieces smaller than 1% of the largest one, such as stray scan noise

Setting	Range	When to change it
Detail	48 to 256 voxels across	Raise it for fine detail such as fingers, text or jewellery. Anything thinner than about one voxel disappears. 256 gave a 523,000-triangle surface on our sample before reducing
Smoothing	0 to 10 passes	0 keeps the voxel steps, 3 removes them, higher values soften sharp edges
Close holes	Cracks, Small holes, Large holes	Seals holes up to about 1, 4 or 8 voxels across. Raise it for scans with open patches; it also merges parts that nearly touch
Triangles	All, 100k, 50k, 20k, 5k	All keeps the full voxel surface. 50k suits printing and sculpting; 20k or 5k suit previews and web
Remove floating specks	On or off	Drops separate pieces smaller than 1% of the largest one, such as stray scan noise

Hole sizes are in voxels, so the same setting closes bigger gaps at lower Detail.

Remesh online vs retopology

This is a voxel remesh, the same family of method as Blender's Voxel remesher and the Voxel mode of its Remesh modifier. It's the right tool when a mesh is broken inside: AI-generated models with overlapping parts and internal faces, photogrammetry scans with holes and noise, kitbashed models made of intersecting pieces. The result is one closed surface, evenly tessellated before it is reduced, ready for 3D printing, sculpting or voxel art.

It is not retopology. Retopology builds clean quads with edge loops that follow the form, which a character needs to bend well in animation. The Blender manual is blunt that no perfect automatic tool exists for that yet. So this isn't an auto retopology tool either: the output is triangles with no edge flow. We tested an open-source quad remesher in the browser and it failed on most of our AI-generated test models, so it isn't offered. For animation, retopologize by hand on top of the remeshed result.

What you lose when you remesh

UVs and textures. The surface is new, so the old UV layout and images no longer apply. The download has a plain material. Give it new UVs with the UV unwrap tool, then bake or paint.

Detail finer than a voxel. At 128 voxels across our sample, one voxel is about 0.8% of the model's longest side, which smooths away small engraving. Raise Detail, or keep the original for close-ups.

Speed and memory at high detail. In Chrome, the 500,000-triangle sample took 3.4 s at 128 voxels with a 50,000-triangle budget. 256 voxels needs about eight times the grid memory, so phones may struggle.

Perfect closure at tiny budgets. Reducing hard can fold two edges together. On our sample, 11 of 12 combinations of detail and budget came out strictly watertight; the miss was 128 voxels at 5k. The tool tells you when this happens. To only cut triangles while keeping UVs and textures, use the mesh simplifier instead.

Remesh tips

Start at 128 voxels and raise Detail only if fine parts disappear
Use Small or Large holes for scans with open patches
Check the watertight note before you send an STL to a slicer
Unwrap the result with the UV unwrap tool if you want to texture it

Avoid

Expect quads or edge loops for rigging; that's retopology
Remesh a model just to lower its triangle count; simplify it instead
Use Large holes on a model with gaps that should stay open, like a mug handle
Throw away the original; textures and fine detail only live there

Related mesh tools

Mesh Simplifier

Reduce any model to an exact triangle target, with Roblox, VRChat and Web presets, keeping UVs and textures.

UV Unwrap

Give any model a fresh, non-overlapping UV layout with xatlas, check it on a checker texture, and download GLB, OBJ or a layout PNG.

STL Repair

Find holes, non-manifold edges and flipped faces, then close the mesh into a watertight, printable solid.

Voxelizer

Rebuild any 3D model from colored cubes at the resolution you pick, then export GLB, OBJ, STL or MagicaVoxel VOX.

Image to 3D

Upload one picture and get a full 3D model with a back, sides and optional texture.

FAQ

Frequently asked questions

Is this remesh tool free?

Yes, with no account, no watermark and no limit on files. The remesh runs on your own computer inside the browser, so there's nothing to pay for. Files up to 200 MB load. Our 500,000-triangle sample finished in 3.4 s at the default settings in Chrome.

What does remeshing do?

It rebuilds the model as a new surface instead of editing the old one. This tool measures the shape on a voxel grid, fills the inside, traces a new closed surface with marching cubes, smooths it and reduces it to your triangle budget. Internal faces, overlaps and small holes disappear along the way.

Is this an auto retopology tool?

No. Retopology means clean quads with edge loops that follow the form, for characters that deform in animation. This tool makes triangles with no edge flow. It's ideal for cleaning AI models and scans, 3D printing and sculpting bases, but for rigging you'd still retopologize by hand on top of the result.

Will the result be watertight for 3D printing?

Almost always. Marching cubes produces a closed surface, and the tool checks that every edge is shared by exactly two triangles after reducing. On our sample, 11 of 12 detail and budget combinations passed. If one fails, a note says so; pick a higher triangle count or All and run it again.

Why did my textures disappear?

A remesh creates a brand-new surface, so the old UV layout no longer exists and the textures have nothing to map to. The download uses a plain material. Unwrap the new mesh with the free UV unwrap tool, then bake the old texture across in Blender or paint a new one.

What Detail value should I use?

Start at the default 128 voxels across the longest side. Raise it towards 256 if fingers, thin rods or text vanish, since anything thinner than about one voxel is lost. Lower it towards 48 for a quick, blobby base mesh for sculpting. The panel shows the voxel size in model units.

Is my model uploaded?

No. The file is read, remeshed and written by JavaScript and WebAssembly inside the page, in a Web Worker on your device. Nothing is sent to a server, so purchased assets and unreleased work stay private.

What's the difference between remesh and mesh simplification?

Simplification removes triangles from the mesh you have and keeps its UVs and textures; problems inside the mesh stay. A remesh replaces the surface: it fixes internal faces, overlaps and holes and gives fresh topology, but the UVs and textures are gone. Simplify a clean model, remesh a broken one.

Sources

1.
Retopology (Blender Manual) — Blender Foundation
“The Voxel remesher works by placing the mesh in a virtual 3D grid, seeing which points of the grid are closest to the mesh’s outer surface, and generating a new mesh with vertices at those points. This means the resulting mesh has uniform topology and has no inner (self-intersecting) geometry.”
2.
Retopology (Blender Manual) — Blender Foundation
“Cleaning up a mesh for 3D printing.”
3.
Retopology (Blender Manual) — Blender Foundation
“Creating topology for a mesh that will be deformed (e.g. a character that will be animated). Such topology has to follow the flow of the geometry, and no perfect automatic tools exist for this right now; it has to be done manually.”
4.
Retopology (Blender Manual) — Blender Foundation
“The Quad remesher uses the Quadriflow algorithm, which can produce better results but is also slower. It’s not a replacement for the Voxel remesher, however, because it doesn’t clean up intersecting geometry.”
5.
Remesh (Blender Manual, sculpting) — Blender Foundation
“Performing this will lose all mesh object data layers associated with the original mesh.”
6.
Remesh Modifier (Blender Manual) — Blender Foundation
“Uses an OpenVDB to generate a new manifold mesh from the current geometry while trying to preserve the mesh’s original volume.”

Start free

Remesh your model now

Drop a model into the tool above, pick detail and a triangle budget, and download a clean, watertight GLB, OBJ or STL in your browser.

Remesh a model

Free · runs in your browser · no sign-up