Free IGES File Viewer Online
Open an IGES (.iges, .igs) file in your browser — no CAD software. Each solid opens as its own part: rotate, section and measure it in 3D, and see its size, volume and weight. STEP, STL and OBJ files open too.
The sample below opens right here. Your own file opens with a free account — it is kept in a private project with its weight, parts list and BOM, ready to quote.
Part summary
IGES, STEP or STL: what the viewer shows
STEP / STP
Exact solids from SolidWorks, CATIA, Inventor, Fusion, Creo or NX, with their part names and colours. Each body is a separate part you can hide, isolate or explode.
IGES / IGS
The older neutral format, still common from legacy CAD and suppliers. Opens the same way as STEP, read with OpenCascade.
STL / OBJ / PLY
Triangle meshes from 3D printing and scanning. Rotate, section and measure them; weight comes from the mesh volume.
Opening a STEP part? The STEP viewer has the same tools. Quoting sheet metal? STEP to BOM reads gauge, flat blank, bends and scrap. Got a 2D drawing instead? Convert PDF to DWG.
Frequently asked questions
How do I open an IGES file without CAD software?
Drop the .iges or .igs file on this page and sign in (or create a free account). It is read with OpenCascade and opens as an interactive 3D model — rotate, section and measure it. Nothing to install. The sample part on this page opens without an account.
IGES or STEP — what is the difference?
Both are neutral CAD exchange formats. IGES (1980s) mostly carries surfaces and is still common from older CAD systems and suppliers; STEP (ISO 10303) carries exact solids, assemblies and colours and is the modern default. This viewer opens both, plus STL, OBJ and PLY meshes.
Can I measure the part?
Yes. Click two points for the distance and its X, Y and Z components, cut a section along any axis, and read each solid’s size, volume and weight in the parts list.
Is the IGES viewer free?
Yes — viewing, measuring and the parts list are free with a free account. Sheet-metal parts also get a fabrication BOM; downloading that BOM is $5 per part.
Is my file kept private?
Your part is stored in your own private project in your Aginera account and is not shared.