Is voxel remesh a lossless repair?

No. It rebuilds the surface on a voxel grid. Small holes, thin walls, sharp edges and text may change or disappear. The result is watertight and manifold but is a new approximation.

Which resolution should I use?

Start with 64. Raise it to 96 or 128 for fine details, accepting more memory and time. Use 48 for a fast preview of the shape or a heavily simplified model.

Why did the remesh fail?

Very thin, open or zero-volume surfaces may not produce a clean occupied region at the chosen resolution. Try another resolution; if it still fails, repair the source mesh or use CAD.

Does it upload the model?

No. Voxelization, the signed-distance field, Manifold WASM and STL writing all run in the local Worker.

Will the output be watertight?

Successful output is checked for zero boundary edges and zero non-manifold edges. The tool reports Watertight yes only after that validation; if validation fails, it returns an error instead of a broken STL.

Mesh repair/Topology

Voxel remesh (local watertight rebuild)

Rebuild a broken or self-intersecting mesh as a watertight surface locally. The Worker voxelizes the triangles, flood-fills the outside, builds a signed-distance field and uses Manifold WASM level-set extraction to produce a clean manifold; nothing is uploaded.

ReadyNo uploadWorkerSTL · OBJ · PLY · 3MF · GLB · glTF

Tool facts

Formats: STL · OBJ · PLY · 3MF · GLB · glTF
Output: Mesh file
Worker: Yes
Max file: 500 MB
Runs: in your browser

Why local

Voxel remesh

No upload

Voxel remesh

Voxel remesh is lossy: sharp edges are rounded and details smaller than one voxel may be removed. Inspect the result before printing.

Drop a mesh to voxel remesh

STL, OBJ, PLY, 3MF, GLB, or glTF. The Worker voxelizes the surface, flood-fills the interior and rebuilds a watertight surface. Lossy; thin features smaller than the voxel size may disappear.

STL · OBJ · PLY · 3MF · GLB · GLTF

Drop a mesh to voxel remesh

STL, OBJ, PLY, 3MF, GLB, or glTF. The Worker voxelizes the surface, flood-fills the interior and rebuilds a watertight surface. Lossy; thin features smaller than the voxel size may disappear.

Choose a file

Max file size: 500 MB · No upload

Voxel resolution

Higher resolution preserves more detail and uses more memory and time. 64 is a balanced default; 128 is slow and triangle-heavy.

How it works

1
Drop an STL, OBJ, PLY, 3MF, GLB, or glTF file.
2
Choose a voxel resolution; 64 is a balanced default, while 48 is faster and 96/128 preserve more detail.
3
The Worker marks surface voxels, flood-fills the outside, computes a signed-distance field and extracts a level-set surface with Manifold WASM.
4
The output is welded, checked for watertightness and non-manifold edges, and written as a binary STL.
5
Download the remeshed STL and inspect thin features and sharp edges before slicing.

What the numbers mean

Method

Surface triangles are rasterized into a voxel grid, the outside is flood-filled, and distances to the surface define a signed field. Manifold WASM extracts a watertight level-set mesh from that field. This repairs self-intersections and many non-manifold defects by reconstructing the surface rather than editing the original triangles.

resolution

Resolution is the voxel count along the longest axis. Higher values preserve smaller features but increase memory, time and output triangles. Features smaller than roughly one voxel can disappear; sharp edges and fine text are rounded.

results

The report shows the voxel size, triangles before and after, the resulting vertex count, watertight/manifold status and remaining self-intersections. A successful remesh is watertight and manifold, but it is a new approximation of the input.

Limits

Input is limited to 500,000 triangles and 500 MB. The operation can fail on extremely thin or zero-volume shapes, or when the occupied voxels do not form a clean surface; try a different resolution or repair the source in CAD.

Printing notes

Compare thin walls, holes and text with the original before printing; coarse voxels can close small gaps or erase details.
Use 64 for a quick repair and 96 or 128 when the model has fine features that must survive.
Run manifold-check after remeshing to confirm the reported watertight result.
Use decimate-mesh afterward if the voxel surface has more triangles than your slicer or workflow needs.

Questions

References

· ISO/ASTM 52900
· Signed distance fields and voxel remeshing
· Manifold level-set extraction