Convert IGES
to SLDPRT.

Updated 2026-10-19

To convert IGES (.iges / .igs) to SLDPRT (.sldprt), drop the file below and download the result, in the browser with nothing installed. True surfaces are rebuilt, so the SLDPRT result behaves like modelled geometry.

2 solid-geometry 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.

ResultTrue surfaces

Planes stay planes and cylinders stay cylinders: a hole comes through as one face with a radius you can measure and mate to.

Unsupported geometry is refused with a message naming it, never silently degraded.

HowThree steps
  1. Drop your .iges file above — up to 200 MB without an account.
  2. SLDPRT is already selected as the output.
  3. Download the .sldprt. 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.

SOLIDWORKS part file (.sldprt)

A SLDPRT file is a single SOLIDWORKS part: the exact solid — true planes, cylinders and splines — plus its feature history, sketches, material and custom properties. It is proprietary, so nothing else on your machine may open it. Assemblies are SLDASM files. One SLDPRT can hold several bodies, and those should stay separate when converting.

You were sent a SLDPRT, do not have SOLIDWORKS, and need the geometry in something your CAD system, slicer or mesher opens.

Questions6 answered
Is the IGES to SLDPRT converter free?
Yes. 2 solid-geometry conversions a day with no account, of 5 in total. A free account converts 4 solid files a day and adds 25 credits. No card.
Will the SLDPRT file keep exact curves and holes?
True surfaces are rebuilt, so the SLDPRT result behaves like modelled geometry. Planes stay planes and cylinders stay cylinders: a hole comes through as one face with a radius you can measure and mate to. Unsupported geometry is refused with a message naming it, never silently degraded.
Will the SLDPRT file open in Fusion 360, Inventor or Onshape?
Yes. SLDPRT is read directly by Fusion 360, Inventor, Onshape, SOLIDWORKS, Creo, NX and FreeCAD. It arrives as a solid body you can measure, mate and cut.
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 SLDPRT to IGES.

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