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GLTF to OBJ
Convert GLTF to OBJ online, free and without signing up. Drop in the GLTF file, set the units, scale and up axis, and save the OBJ file. Nothing is uploaded: your browser reads and writes the model on your device.
How to convert GLTF to OBJ
- 1Drop your GLTF file in, or click to choose it
- 2Check the units, the scale and the up axis
- 3Press Convert and save the OBJ file
- A OBJ file with your model, in the size you set.
What happens to your files
- Nothing is uploaded.Your GLTF file is read and the OBJ file is written by your browser, on your own device.
- Checked after writing.The new file is read back, and anything that did not make it across is listed.
- Units and axes are yours.Set the units, a scale and the up axis before you save.
What you can do
- Convert GLTF to OBJ with one tool: choose the units, a scale factor and the up axis (Z-up or Y-up) before you save.
- See the size the model will have in the new file, and a list of what the new format cannot hold, before you convert.
- Merge all parts into one mesh, or apply transforms so the positions are baked into the vertices.
- Look at the model in the preview first. Drop the companion files (.mtl, .bin, textures) or a ZIP together with it.
Good to know
- glTF is the Khronos format for 3D on the web: JSON with a separate .bin and textures. Here it is saved as a ZIP, and read from files dropped together.
- OBJ is a plain-text format from Wavefront for shapes, with materials in a separate .mtl file. It has no unit and no animation, and PBR maps are dropped.
- STL, OBJ and PLY have no unit, so you choose one. 3MF is written in millimetres, FBX in centimetres and the other formats in metres.
- Not every format holds everything. STL keeps only the shape, PLY has no textures, and DAE leaves animations out. The page lists this before you save.
- A glTF or OBJ result is saved as a ZIP with the .bin or .mtl file and the textures next to the model.
- FBX, 3MF and DAE are written by a 7 MB add-on that loads once, from ToolRecipe itself, the first time you pick one of them.
Questions
Is GLTF to OBJ free, and is my file uploaded?
It is free, and there is no sign-up. The file is not uploaded: your browser does the conversion on your device.
Does the model keep its size?
Yes, when the file states its unit, it is carried across. If it does not, you say which unit the numbers are in. The size in the new file is shown before you save.
Why is my model turned in the new file?
Some formats are Z-up (STL, 3MF) and others Y-up (GLB, USDZ, FBX). By default the model is turned to suit the pair. Change "Up axis" to keep it as it is.
What gets lost when I convert GLTF to OBJ?
It depends on the two formats. The page lists what the new format cannot hold before you save, and checks the new file after writing.