OBJ Compressor — Shrink Heavy OBJ Meshes Online
Turn bloated OBJ files into compact, web-ready models — processed entirely in your browser, free and without signup.
Upload Your Model
Drop a 3D file or browse your device. Your model never leaves this browser tab.
Click or drop your file here
Supported formats: GLB, GLTF, OBJ, FBX, STL, PLY
Preview
Upload a model to see it here
🔒 100% client-side processing. Your model is processed in this browser tab and is never uploaded to any server.
OBJ is one of the oldest and most universal 3D formats — and one of the most wasteful. It stores geometry as plain text with no compression at all, so a mid-poly model can easily balloon into tens or hundreds of megabytes.
This OBJ compressor solves it the practical way: the mesh is deduplicated, cleaned up and re-encoded into an optimized binary GLB with Draco or meshopt compression — typically 90% smaller. Same geometry, same UVs, a fraction of the weight.
Compress OBJ when you need to:
- Share 3D scans and models without hitting email or upload limits
- Embed OBJ-sourced assets in web viewers that expect GLB
- Slim down exports from Blender, Maya, 3ds Max or ZBrush
How to Compress a 3D Model Online
Upload your OBJ file
Drag the file onto the drop zone or click to browse. It is processed entirely in your browser — nothing is uploaded to a server.
Choose a compression preset
Pick Light for gentle cleanup, Balanced for the best size-to-quality trade-off, or Max for the smallest possible file.
Download the optimized model
Preview the result, check the size savings and download. If the file cannot shrink further, you get the original back.
Other 3D Compressors
Every format gets its own optimization pipeline — pick yours.
3D Compression — Frequently Asked Questions
How do I compress an OBJ file?+
Drop the OBJ onto the tool above and pick a preset. The mesh is welded, cleaned and re-encoded into an optimized GLB right in your browser — usually in seconds — ready to download. Nothing is uploaded.
Why are OBJ files so large?+
OBJ stores every vertex, normal and UV coordinate as uncompressed ASCII text, and each face references them by index. A few million triangles can produce files hundreds of times larger than the same geometry in a compressed binary format.
What format do I get after compressing OBJ?+
You get a GLB — the modern binary successor of OBJ that keeps geometry, UVs and basic materials in one compact file. Every major web viewer, engine and AR pipeline reads it natively.
Is the conversion lossless for geometry?+
Yes — vertex positions, normals and texture coordinates are preserved exactly. Light and Balanced presets don't remove any triangles; only the Max preset simplifies the mesh, and it tells you when it does.
Don't Have a OBJ File Yet?
Generate one first — turn a text prompt or a photo into a 3D model, then shrink it here in seconds.
Create a 3D Model