# Convert STEP to IGES Online: STP to IGS Exchange

Convert STEP/STP models to IGES online. The IGES result is geometry exchange and does not guarantee the original assembly structure or solids.

Convert a STEP or STP model to IGES when a receiver still requires IGS. Check the result: IGES may represent the shape as surfaces rather than as the same solid assembly.

## Start from the STEP file you intend to send

Open the STEP model and confirm units, bodies and component scope before converting. Converting a partial or wrong revision only produces another copy of that input.

## Convert STEP to IGES

Choose IGES as the output and download the file. The result is for geometry exchange. It does not promise that assembly structure, solid topology or product manufacturing information will survive.

## Reopen the IGES before you send it

Check one known dimension and whether the receiver needed solids or can accept surfaces. An IGES file of open shells will not provide a reliable volume.

## Questions

### Can I convert STEP to IGES online?

Yes. Upload a STEP or STP file, choose IGES and download the converted file.

### Will IGES keep my STEP assembly as solids?

Not necessarily. IGES is a surface-oriented exchange format. Assembly structure and closed solids are not guaranteed in the output.

### Should I use IGES instead of STEP?

Use IGES when the receiving process asks for it. For a new handoff, STEP is usually the clearer neutral format. Confirm the requirement before converting.

## Related guides

- [STEP vs IGES: Which CAD Exchange Format Fits the Job?](https://www.cadprops.com/guides/step-vs-iges/index.md)
- [IGES Surfaces Not Solid? Check Volume and Open Shells](https://www.cadprops.com/guides/iges-surfaces-not-solid/index.md)
- [CAD File Conversion Checklist: Units, Solids & Accuracy](https://www.cadprops.com/guides/cad-conversion-checklist/index.md)

## Related tools

- [STEP viewer](https://www.cadprops.com/tools/step-viewer/index.md)
- [IGES / IGS viewer](https://www.cadprops.com/tools/iges-viewer/index.md)
- [IGES to STEP](https://www.cadprops.com/tools/iges-to-step/index.md)

HTML page: https://www.cadprops.com/tools/step-to-iges/