Convert IGES
to OBJ.

Updated 2026-10-17

To convert IGES to OBJ, drop the .iges or .igs file into the converter below and download the .obj. The surfaces are triangulated to within 0.02 mm, edges first so outlines stay crisp, and the OBJ is written in millimetres, ready for Blender, 3ds Max, Unity or a renderer. 5 conversions a day are free with no account, and nothing is installed. Blender does not import IGES on its own, which is usually why this conversion is needed.

5 conversions a day with no account. No card, no install.

No account needed
Drop a IGES file.iges / .igs · up to 200 MB

On our servers. No account: deleted within 24 hours. Signed in: kept until you delete them. Never shared or used for training.

ResultTessellated

Edges are sampled first, so chamfers, fillets and holes come through crisp. Default tolerance: 0.02 mm chord deviation, 0.1 rad angle — fine enough to print directly.

Tessellation is one-way — keep the IGES file if you will edit the shape later.

ChangesIGES → OBJ

What changes between IGES and OBJ

IGES is an engineering format: exact trimmed surfaces, written by CAD and CAM systems. OBJ comes from graphics: a polygon mesh, read by nearly every modelling, rendering and game tool. Converting turns each surface into triangles; a curved face becomes a fan of facets no more than 0.02 mm from the true surface.

What you get is one mesh object. IGES colours, levels and entity names are not carried, and the OBJ arrives with no material, so assign materials in the tool you open it in. There are no texture coordinates either: an engineering surface has none to give.

Scale is the usual surprise. The OBJ is in millimetres, while Blender and most game engines treat one unit as a metre, so a 200 mm part can arrive 200 units across. Scale it by 0.001 on import if your scene is in metres. And because many IGES files are loose surfaces rather than a closed solid, the mesh can have open edges where surfaces never met; for rendering that rarely matters.

HowThree steps
  1. Drop your .iges file above — up to 200 MB without an account.
  2. OBJ is already selected as the output.
  3. Download the .obj. Without an account, files are deleted within 24 hours; signed in, they are kept until you delete them.
FormatsWhat you are holding

IGES file (Initial Graphics Exchange Specification) (.iges / .igs)

IGES predates STEP and is still requested by older CAM systems and mould and die workflows. It stores exact geometry, but many IGES files are loose trimmed surfaces that never close into a watertight solid. Unless someone asks for IGES by name, STEP is the better choice.

A CAM programmer, toolmaker or legacy system asked for IGES, or you were handed one and need something current.

Wavefront OBJ file (.obj)

OBJ is a plain-text mesh format from graphics. Unlike STL it keeps named groups, texture coordinates, materials and polygon faces, which makes it the usual handover into rendering and texturing tools. It is still a mesh, not a solid.

The destination is a renderer, game engine, texturing tool or visualisation pipeline.

Questions9 answered
How do I get an IGES file into Blender?
Convert it to OBJ here, then use File, Import, Wavefront (.obj) in Blender. Scale it by 0.001 if your scene is in metres.
Why is my model huge, or tiny, after import?
The OBJ is in millimetres and OBJ records no unit, so the importing program guesses. Scale by 0.001 to go from millimetres to metres.
Are colours or layers kept?
No. The OBJ holds the geometry as one object with no material. Assign materials after import.
Should I use OBJ or GLB?
OBJ for modelling and rendering tools, which all read it. GLB for the web and real-time engines, where one compact binary file is easier to ship.
Is the IGES to OBJ converter free?
Yes. 5 conversions a day with no account and no card. A free account raises the limit and adds 25 credits.
How accurate is the OBJ mesh?
The exact surfaces are triangulated into a OBJ mesh. Edges are sampled first, so chamfers, fillets and holes come through crisp. Default tolerance: 0.02 mm chord deviation, 0.1 rad angle — fine enough to print directly. Tessellation is one-way — keep the IGES file if you will edit the shape later.
How big a file can I convert?
To a mesh format like STL: 300 MB with a free account, 200 MB without one. To STEP, Parasolid or SLDPRT: 140 MB, because rebuilding a solid takes about twice the memory of writing a mesh. Maker and Studio convert up to 830 MB and 380 MB — a large conversion on a paid plan gets the server to itself.
Is it safe to upload my IGES file?
Files travel encrypted and are processed by machine on our own servers — no third parties, no ads or trackers, no AI training.
Is my IGES file deleted after converting?
Without an account, the upload and the result are deleted within 24 hours. With an account, both stay in your files until you delete them; deleted files leave our servers within 24 hours.
Beyond convertingSame file, four workspaces

Keep the part open: fill it with a lattice, check it with FEA, texture a surface, or slice it into cut-ready sheets. These workspaces are in early access — create an account, then apply from inside the app.

Create free account See pricing

AlsoOther ways in
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Going the other way? Convert OBJ to IGES.