What is an IGES / IGS file?

IGES is the predecessor of STEP: an ASCII CAD exchange format from the 1980s, still produced by older CAM systems and shipped with legacy archives. It stores surfaces, curves, and annotations.

Should I prefer STEP over IGES?

If you can choose, yes — STEP carries assembly structure, units, and tolerance data more cleanly. IGES remains useful when STEP isn't available.

No. Files are opened entirely in your browser using local JavaScript and WebAssembly. Nothing is sent to a server.

Does it work on mobile?

Yes. The viewer is mobile-first and works on phones, tablets, and desktops.

CAD & PCB.iges · .igs

IGES / IGS viewer

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IGES / IGS · .iges · .igs

Open IGES / IGS files

Initial Graphics Exchange Spec (CAD).

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About IGES / IGS

Initial Graphics Exchange Spec (CAD).

IGES (Initial Graphics Exchange Specification) predates STEP and still circulates in legacy engineering archives, aerospace data drops, and machine-tool toolpaths. OpenCascade tessellates the surfaces and curves; three.js renders the result with orbit controls and an assembly tree.

FAQ

What is an IGES / IGS file?: IGES is the predecessor of STEP: an ASCII CAD exchange format from the 1980s, still produced by older CAM systems and shipped with legacy archives. It stores surfaces, curves, and annotations.
Should I prefer STEP over IGES?: If you can choose, yes — STEP carries assembly structure, units, and tolerance data more cleanly. IGES remains useful when STEP isn't available.
Is my file uploaded?: No. Files are opened entirely in your browser using local JavaScript and WebAssembly. Nothing is sent to a server.
Does it work on mobile?: Yes. The viewer is mobile-first and works on phones, tablets, and desktops.

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