Convert IGES to glTF
Convert IGES to glTF in your browser. The conversion runs on this page and the file never leaves your computer.
Result
Before you convert: what this keeps and what it destroys
Preserved
- The shape, to within the tessellation tolerance
- Overall dimensions and proportions
- Watertightness, where the input is watertight
- Colour
Destroyed
- Exact curves and surfaces, replaced by triangles
- The feature tree and any parametric history
- A recorded unit: glTF stores none
Why people convert IGES to glTF
The same conversion as IGES to GLB, in the container you can open in a text editor. Useful when you are debugging a pipeline and want to see the node tree, or when the JSON and the geometry are cached separately downstream.
The file written here is self-contained: the buffer is embedded as a base64 data URI rather than left in a separate .bin, so there is nothing to lose in transit. It runs about a third larger than the equivalent GLB for that convenience.
The IGES side behaves as it does everywhere on this site. Surfaces are evaluated and tessellated, the unit comes from the Global section and is converted into glTF's metres, and unstitched patches produce an open mesh that the report will tell you about.
What you get
You get a plain-text glTF file you can open in an editor containing triangles. The reader tessellates supported surfaces or uses saved render meshes where required by the source format. Inspect curved faces at the intended output size. The triangle count depends on the model and the reader's meshing settings.
The output uses metres, as required by the glTF specification.
Carried across: supported base or vertex colour.
The conversion runs in your browser. Your file stays on your computer and is not uploaded.
What to check afterwards
- IGES declares its unit in the file. Check the output dimensions in the receiving application, especially when its import settings can override the unit.
- Curves become facets. IGES stores exact surfaces, so a hole is a cylinder with a radius. glTF stores triangles, so that cylinder becomes a many-sided prism. Look at curved faces in the result at the size you intend to make the part.
If you need something this conversion cannot give you
If you need editable CAD geometry, don't convert at all. Open the IGES file directly in FreeCAD, Fusion, Onshape or SolidWorks. Every mesh format destroys the exact surfaces, and no later conversion brings them back.
Going the other way
This site reads IGES but does not write it. For the reverse conversion, use an application that can export IGES.
How we know this conversion works
This pair was checked against 1 file from the test corpus on 2026-09-04. Each run parses its own output back in and compares the bounding box, the triangle count and, for closed solids, the volume against the input.
A pair that fails those checks doesn't get a page. That's why this site lists 120 conversions and not the several hundred a format-times-format grid would suggest.