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About the OBJ format
OBJ is a veteran, universal text format supported by practically every 3D application. It's mostly used for interchange between 3D apps (Blender, Maya, 3ds Max), texturing, rendering, and it stores geometry, UVs and normals (materials live in a separate MTL file).
Frequently asked questions
Where are my OBJ's textures?
OBJ stores the geometry; materials live in a separate .mtl and textures in loose image files. Uploading only the .obj shows the untextured mesh — that's normal, not a broken file.
Why is OBJ still so widely used?
It's plain text, readable, and supported by absolutely everything — from Blender to industrial printers. For exchanging pure geometry between programs it remains the perfect lowest common denominator.
Can I 3D print an OBJ?
Yes: slicers accept it directly. Converting to STL is only needed for workflows that demand it; the geometry that reaches the gcode is the same.
Other viewers
Online OBJ viewer
Drop your OBJ file and explore it instantly: real-mm measurements, wireframe and screenshots. The file never leaves your computer.