Q
Is the download still OBJ?
A
Yes, the result stays OBJ (packaged as a ZIP when MTL and textures are present), not converted to GLB. Geometry is simplified in place so the OBJ pipeline and downstream tools keep working.
OBJ Vertex Compression
Reduce polygon count and keep OBJ output.
Workspace
Drop files here
or click to browse, paste supported
About This Tool
Geometry simplification for OBJ. Meshopt/Draco do not apply (glTF-only). Output remains OBJ (with MTL/textures when present). Local processing. OBJ decimation is controlled by a single target ratio, so you can trade detail for size in one step.
About Configuration Options
Vertex / Geometry
Mesh Simplification
50%0% – 100% · step 5%- Reduces the number of faces and vertices using mesh simplification. Default medium strength; increasing strength shrinks file size further but may lose surface detail. Only affects geometric density, not the container format.
Frequently Asked Questions
View all FAQsQ
Why is OBJ limited to mesh simplification?
A
Meshopt and Draco are glTF container extensions, so they don't apply to OBJ. OBJ compression relies on mesh simplification only; combined with the smaller vertex/face data, dense OBJ files still shrink noticeably.
Q
Can an OBJ with MTL and textures be compressed?
A
Yes. The geometry is simplified while MTL, textures, UVs, and materials remain unchanged, and the output is an OBJ package (ZIP). Upload the MTL and textures together so references resolve correctly.
Q
Can the OBJ text format itself be compressed?
A
OBJ is a text format whose size comes mainly from vertex and face data. Reducing the number of faces is the direct and effective way to shrink it: the output is an optimized OBJ or ZIP package, still in text form.
Q
Will compression affect visual quality?
A
Lower intensity keeps more detail at the cost of a larger file; higher intensity removes more faces and can flatten curves. Use the real-time preview to compare before and after: dense sculpts tolerate stronger decimation before silhouettes degrade.
Q
Will UV coordinates and textures stay mapped?
A
Yes. Simplification changes topology but keeps the UV coordinates of the remaining faces, so the existing MTL and textures continue to wrap correctly. Spot-check UV seams and stretched areas in the preview.