OBJ format (.obj) — open, view, convert

What is a OBJ file?

OBJ is a plain-text mesh format from the world of computer graphics. It stores vertices, normals, texture coordinates and polygon faces, and nearly every 3D application — Blender, Maya, 3ds Max, game engines, renderers — can read and write it, making it a dependable lowest common denominator for mesh exchange.

Human-readable and easy to debug
Universally supported across DCC tools and engines
Carries UVs and normals for texturing workflows

Best for: Exchanging textured meshes between modeling and rendering tools.

View OBJ files online

Open .obj files in the free online OBJ viewer — assembly tree, section views and display modes, entirely in your browser.

How to open a OBJ file

Open the online OBJ viewer. It runs in your browser, so there is no software to install and no account to create.
Drop your .obj file in. The file is parsed locally and never uploaded. Inspect it with the assembly tree, section views and display modes.
Convert it if you need another format. Press Convert to turn OBJ into STL, then download the result straight from your browser.

Convert OBJ to other formats

OBJ to STL OBJ to PLY OBJ to GLB OBJ to glTF OBJ to 3MF OBJ to OFF OBJ to USDZ

Convert other formats to OBJ

STEP to OBJ IGES to OBJ BREP to OBJ STL to OBJ PLY to OBJ GLB to OBJ glTF to OBJ 3MF to OBJ COLLADA to OBJ AMF to OBJ FBX to OBJ 3DS to OBJ OFF to OBJ LAS to OBJ PCD to OBJ XYZ to OBJ PTS to OBJ

Frequently asked questions

How do I open a .obj file?

Drop it into the free online OBJ viewer on this site — it renders in your browser with an assembly tree and section views, and the file is never uploaded. No software install needed.

Does OBJ store units and colors?

Units: no. Colors/materials: via mtl sidecar. Geometry is stored as polygon mesh.

How do I convert OBJ to STL?

Use the free OBJ to STL converter: drop the file, press Convert, download. Everything runs locally in your browser — no upload, no signup.

What is OBJ best used for?

Exchanging textured meshes between modeling and rendering tools.

Why can an OBJ open without its materials?

OBJ geometry normally points to a separate MTL file, which may point again to texture images. If those sidecars are missing or moved, the mesh remains but its intended appearance does not.

Can OBJ store animation?

No. OBJ is used for dcc tool interchange, and its format does not carry animation tracks.

OBJ file format (.obj)