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IGES STP
Free online converter

Convert IGES to STP

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IGES to STP converterFREE
Drop a .IGES file here
or pick one - we convert it to .STP and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert IGES to STP

  1. Add your .IGES file - drop it in the box above or click to browse.
  2. Convert it to .STP in a few seconds.
  3. Download your new .STP file.

What to expect

  • Geometry stays exact B-rep, with no tessellation or faceting.
  • A surface-only IGES yields a surface-only STP; source gaps are not auto-healed.
  • STP and STEP are the same ISO 10303 format under two extensions; both are plain-text, geometry-only CAD.

Frequently asked questions

Is this exact geometry?
Yes. STP is the .stp spelling of STEP, and like IGES it stores precise boundary-representation geometry, so the surfaces and solids translate without being meshed.
Why convert IGES to STP?
STP/STEP (ISO 10303) is the modern neutral CAD standard, with wider and more reliable support than the older IGES, which improves interoperability between CAD programs.
Where does an STP open?
FreeCAD, CAD Assistant, the Autodesk Viewer online, and essentially every professional CAD program.
What is lost?
If the IGES holds loose surfaces rather than a closed solid, the STP stays a surface model. The conversion does not invent a watertight body.
Learn about the formats: .IGES · .STP
Programs that convert IGES: Autodesk Inventor · SolidWorks · AutoCAD · Creo Parametric · 3ds Max (3D Studio Max) · Autoconverter · Solid Edge · TopSolid