Should I use IGES or STEP?

STEP is preferred for new work — it carries solid topology and PMI. Use IGES only when exchanging with legacy systems or surface-only workflows (industrial design, shipbuilding).

3D Solid & B-Rep Standard90 verified tools

Software That Opens & Edits IGES Files (90 Tools, 2026)

IGES is the older neutral CAD exchange format, predating STEP and historically used heavily in aerospace, automotive, and shipbuilding workflows where surface geometry (not solids) was the primary representation. IGES carries NURBS surfaces, curves, and analytic primitives, but lacks STEP's solid topology and PMI. Most mechanical CAD tools still read and write IGES for backwards-compatibility with legacy data.

Instant IGES Engineering Utilities

Convert, Compress & Inspect IGES Files Online

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B-Rep Exchange

SLDPRT / CATPart / NX to STEP

Lossless neutral ISO 10303-21 B-Rep solid assembly conversion.

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Size Optimizer

STEP Assembly Defeature & Reducer

Strip internal fasteners & threads to shrink 300MB+ STEP files.

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PMI Standard

STEP AP214 vs AP242 Comparator

Compare automotive AP214 vs Model-Based Definition AP242.

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Full read & write support (57)

AA
Alias AutoStudioRead & Write
Subscription · Windows / macOS · ★ 4.9
Industrial design and automotive styling software.
AD
Altium DesignerRead & Write
Subscription / Perpetual · Windows · ★ 4.9
The professional standard for PCB and electronics design.
AM
ANSYS MechanicalRead & Write
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The gold standard for structural FEA simulation.
GD
Geomagic Design XRead & Write
Custom Quote · Windows · ★ 4.9
The world's most comprehensive reverse engineering software.
M
MastercamRead & Write
Subscription / Perpetual · Windows · ★ 4.9
The global leader in CAM software for manufacturing.
O
OnshapeRead & Write
Subscription · Web / iOS / Android · ★ 4.9
The professional CAD system built for agile cloud development.
R3
Rhino 3DRead & Write
Perpetual · Windows / macOS · ★ 4.9
The industry standard for complex NURBS modeling and computational design.
S
SolidWorksRead & Write
Subscription / Perpetual · Windows · ★ 4.9
The de-facto industry standard for 3D parametric mechanical design.
AH
Altair HyperWorksRead & Write
Subscription · Windows / Linux · ★ 4.8
Comprehensive simulation-driven design platform.
A
AutoCADRead & Write
Subscription · Windows / macOS / Web / Android / iOS · ★ 4.8
The global industrial standard for 2D drafting and 3D modeling.
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CimatronRead & Write
Subscription · Windows · ★ 4.8
Integrated CAD/CAM for mold and die makers.
F3
FabRapid 3DRead & Write
Free · Web / Windows / macOS / Linux · ★ 4.8
Free, browser-based WebAssembly 3D & CAD format converter with zero server uploads and 1,600+ conversion pairs.
F3
Fusion 360Read & Write
Subscription · Windows / macOS / Android / iOS · ★ 4.8
The cloud-native powerhouse for integrated CAD, CAM, and CAE.
M
MicroStationRead & Write
Subscription · Windows · ★ 4.8
The infrastructure engineering standard for massive projects.
PC
PTC CreoRead & Write
Subscription · Windows · ★ 4.8
The original parametric 3D CAD powerhouse.
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Siemens NXRead & Write
Custom Quote · Windows / Linux · ★ 4.8
Powerful high-end CAD/CAM/CAE suite for advanced manufacturing.
VM
VISI ModellingRead & Write
Subscription · Windows · ★ 4.8
Specialized CAD/CAM for the mold and die industry.
A
AbaqusRead & Write
Subscription · Windows / Linux · ★ 4.7
High-fidelity non-linear finite element analysis from Dassault Systèmes Simulia.
AI
Autodesk InventorRead & Write
Subscription · Windows · ★ 4.7
Professional-grade 3D mechanical design and simulation.
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BricsCADRead & Write
Subscription / Perpetual · Windows / macOS / Linux · ★ 4.7
The modern CAD platform for 2D, 3D, BIM, and Mechanical.
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CATIARead & Write
Subscription / Perpetual · Windows · ★ 4.7
The high-end PLM standard for Aerospace and Automotive engineering.
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Shapr3DRead & Write
Freemium · Windows / macOS / iOS · ★ 4.7
Professional CAD for mobile and desktop mobility.
SE
Solid EdgeRead & Write
Subscription / Perpetual · Windows · ★ 4.7
Professional 3D CAD with industry-leading Synchronous Technology.
AW
ANSYS WorkbenchRead & Write
Subscription · Windows / Linux · ★ 4.6
Unified Ansys simulation platform for project management, geometry prep, and multi-physics coupling.
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CAMWorksRead & Write
Subscription · Windows · ★ 4.6
Knowledge-based CAM solution by HCL Technologies.
CM
COMSOL MultiphysicsRead & Write
Perpetual · Windows / macOS / Linux · ★ 4.6
Coupled multi-physics finite element simulation across electromagnetics, structures, fluids, and chemistry.
M2
MECHCAD 2026Read & Write
Custom Quote · Windows · ★ 4.6
Professional 3D parametric CAD suite with part and assembly modeling, kinematic motion simulation, and CNC toolpath generation.
TP
TurboCAD PlatinumRead & Write
Perpetual · Windows / macOS · ★ 4.6
All-in-one professional 2D/3D design suite.
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VectorworksRead & Write
Subscription / Perpetual · Windows / macOS · ★ 4.6
The all-in-one BIM solution for landscape and entertainment design.
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Alibre DesignRead & Write
Perpetual · Windows · ★ 4.5
Professional 3D CAD without the enterprise price tag.
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Altair InspireRead & Write
Subscription · Windows · ★ 4.5
Generative design and rapid FEA platform from Altair, with topology optimization at its core.
AD
ANSYS DiscoveryRead & Write
Subscription · Windows · ★ 4.5
Real-time simulation-driven design with live solver feedback during modeling.
P
PlasticityRead & Write
Perpetual · Windows / macOS / Linux · ★ 4.5
New-generation 3D modeller blending the best of Rhino, Blender, and CAD — Parasolid under the hood.
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ZW3DRead & Write
Subscription / Perpetual · Windows · ★ 4.5
All-in-one 3D CAD/CAM solution from ZWSOFT.
3
3DEXPERIENCERead & Write
Subscription · Windows / Web · ★ 4.3
Dassault Systèmes' cloud-based collaborative platform that unifies design, engineering, simulation, and manufacturing through virtual twin technology.
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CAD ExchangerRead & Write
Freemium · Windows / macOS / Linux / Web / iOS / Android · ★ 4.3
Mobile 3D CAD viewer and converter for multiple file formats.
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MoI3DRead & Write
Perpetual · Windows / macOS · ★ 4.3
Moment of Inspiration — lightweight NURBS modeller beloved for fast concept design.
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PowerMillRead & Write
Subscription · Windows · ★ 4.3
Autodesk's advanced CAM software for CNC programming, specializing in 3- and 5-axis manufacturing for complex parts in aerospace, automotive, and toolmaking industries.
F
FreeCADRead & Write
Open Source · Windows / macOS / Linux · ★ 4.2
The premier open-source 3D parametric modeler.
G
GloviusRead & Write
Freemium · Windows / Web / iOS / Android · ★ 4.2
Mobile 3D CAD file viewer for viewing and analyzing 3D models.
MP
MSC PatranRead & Write
Custom Quote · Windows / Linux · ★ 4.2
Long-standing FEA preprocessor and post-processor from Hexagon/MSC, tightly paired with MSC Nastran.
A
AutoFormRead & Write
Custom Quote · Windows · ★ 4.1
Swiss software platform for sheet metal forming and BiW assembly process engineering.
H
hyperMILLRead & Write
Perpetual · Windows · ★ 4.0
German CAD/CAM software for optimized NC milling and turning programs for machine tools.
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GibbsCAMRead & Write
Perpetual · Windows · ★ 3.9
Cutting-edge CAM software for programming CNC machine tools with power and flexibility.
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PAM-STAMPRead & Write
Custom Quote · Windows · ★ 3.9
ESI Group's sheet metal forming simulation software using finite element analysis for stamping process optimization and spring back compensation.
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TebisRead & Write
Custom Quote · Windows · ★ 3.9
German CAD/CAM/CAQ/MES software for die, model, and machine manufacturing.
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FeatureCAMRead & Write
Subscription · Windows · ★ 3.8
Automated CAM software for CNC milling, turning, and Swiss machining — offered as Autodesk Fusion with FeatureCAM.
V
VisiRead & Write
Perpetual · Windows · ★ 3.7
CAD/CAM software by Hexagon for mold, die, and progressive die design.
B
BobCAD-CAMRead & Write
Perpetual · Windows · ★ 3.5
US-based affordable CAD/CAM software for CNC machining with 2-5 axis capabilities.
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SURFCAMRead & Write
Perpetual · Windows · ★ 3.5
US-based CAM software for 2-5 axis milling, turning, and wire EDM.
AE
AVEVA E3D DesignRead & Write
Subscription / Perpetual · Windows · ★ 0.0
Advanced 3D plant design and engineering software for process, power, and marine industries with intelligent modeling capabilities.
DM
DesignSpark MechanicalRead & Write
Freemium · Windows · ★ 0.0
Free 3D CAD software for mechanical design with access to extensive component libraries and manufacturer support.
E
ESPRITRead & Write
Custom Quote · Windows · ★ 0.0
High-performance CAM software for CNC programming, covering 2-5 axis milling, turning, mill-turn, and Swiss-type machining.
K
KOMPAS-3DRead & Write
Perpetual · Windows · ★ 0.0
Professional 3D CAD software for mechanical engineering with parametric modeling, solid/surface/sheet metal design, and integrated analysis tools.
MC
midas CivilRead & Write
Subscription / Perpetual · Windows · ★ 0.0
Advanced structural analysis and FEM software for civil engineering, bridge design, and infrastructure projects.
MG
midas GenRead & Write
Subscription / Perpetual · Windows · ★ 0.0
General-purpose structural analysis and FEM software for building design, architecture, and general engineering applications.
T
TopSolidRead & Write
Custom Quote · Windows · ★ 0.0
TopSolid, a global leader in CAD/CAM/ERP software publishing, primarily targets the mechanical engineering, sheet metal

Showing top 20 products. Click to show remaining 37 tools.

Read-only / viewers (33)

AM
AVEVA MarineRead Only
Custom Quote · Windows · ★ 4.9
Integrated engineering and design for shipbuilding.
M
MagicsRead Only
Custom Quote · Windows · ★ 4.9
Data and build preparation for 3D printing.
MN
MSC NastranRead Only
Custom Quote · Windows / Linux · ★ 4.9
NASA-born structural analysis solver, now by Hexagon.
N
nTopRead Only
Custom Quote · Windows · ★ 4.9
Engineering design software for additive manufacturing.
TS
Tekla StructuresRead Only
Custom Quote · Windows · ★ 4.9
The world's most advanced structural BIM software.
N
NavisworksRead Only
Subscription · Windows · ★ 4.8
Project review software for clash detection.
S
SolidCAMRead Only
Subscription · Windows · ★ 4.8
The leading integrated CAM for SolidWorks.
AF
ANSYS FluentRead Only
Subscription · Windows / Linux · ★ 4.7
Industry-leading CFD solver for fluid dynamics, heat transfer, and reaction simulations.
K
KiCadRead Only
Open Source · Windows / macOS / Linux · ★ 4.7
Free, open-source professional schematic capture and PCB layout suite.
L
LS-DYNARead Only
Custom Quote · Windows / Linux · ★ 4.7
Explicit non-linear dynamics solver for crash, blast, drop, and metal forming.
3W
3Dstudio.co Web ToolsRead Only
Free · Web · ★ 4.6
Free client-side browser tools to view, inspect, and convert IFC, STEP, STL, DWG, and 3D files without uploading.
SS
Simcenter STAR-CCM+Read Only
Custom Quote · Windows / Linux · ★ 4.6
Multi-physics CFD platform from Siemens Digital Industries, strong in marine, turbomachinery, and electronics cooling.
3M
3ds MaxRead Only
Subscription · Windows · ★ 4.5
Industry-standard 3D modeling, animation, and rendering software for games, film, and visualization.
K
KeyShotRead Only
Subscription · Windows / macOS · ★ 4.5
Real-time ray-tracing rendering software for product visualization and industrial design.
MA
MSC AdamsRead Only
Custom Quote · Windows / Linux · ★ 4.5
Multibody dynamics simulation for mechanisms, vehicles, and powertrains.
S
SimScaleRead Only
Subscription · Web · ★ 4.5
Browser-based cloud CFD/FEA/thermal simulation platform with per-hour pricing.
C
CADPropsRead Only
Free · Web · ★ 4.4
Free browser-based multi-format CAD viewer and engineering measurement platform.
F
FemapRead Only
Perpetual · Windows · ★ 4.4
Siemens Femap is a CAD-independent FEA pre/postprocessor primarily paired with NX Nastran.
HS
Hexagon SmartPlant 3DRead Only
Custom Quote · Windows · ★ 4.4
Hexagon's data-centric plant-design platform (now part of CADWorx & Analysis Solutions).
AP
AutoCAD Plant 3DRead Only
Subscription · Windows · ★ 4.3
Autodesk's specialized plant-design toolkit for piping, equipment, and P&ID workflows — included with AutoCAD subscription.
AN
Autodesk NetfabbRead Only
Subscription · Windows · ★ 4.3
Industrial additive manufacturing prep, lattice, and build-plate optimization.
SE
Solid Edge ViewerRead Only
Free · Windows · ★ 4.2
Free viewer for Solid Edge and 2D CAD files.
M
MoldflowRead Only
Subscription · Windows · ★ 4.0
Autodesk injection molding simulation software for plastic part and mold design.
M
Moldex3DRead Only
Custom Quote · Windows · ★ 3.9
Taiwanese plastic injection molding simulation software for advanced analysis.
E
EdgecamRead Only
Perpetual · Windows · ★ 3.8
CAM software by Hexagon for CNC milling, turning, and multi-axis machining.
S
SigmaNESTRead Only
Custom Quote · Windows · ★ 3.8
US-based CAD/CAM nesting software for laser, plasma, punch, router, waterjet, and tube cutting.
W
WorkNCRead Only
Perpetual · Windows · ★ 3.8
French CAM software for 2-5 axis milling with automatic feature recognition.
A
AlphaCAMRead Only
Perpetual · Windows · ★ 3.6
UK-based CAM software for woodworking, stone, and metal cutting.
K
KISSsoftRead Only
Custom Quote · Windows · ★ 3.6
Swiss gear calculation and design software for mechanical engineering.
R
RadanRead Only
Perpetual · Windows · ★ 3.6
UK-based CAD/CAM software for sheet metal fabrication and CNC punching.
LE
Lantek ExpertRead Only
Custom Quote · Windows · ★ 3.5
Spanish CAD/CAM software for sheet metal punching and cutting.
O
OrCADRead Only
Subscription / Perpetual · Windows · ★ 0.0
Cadence's professional PCB design suite featuring PSpice simulation, schematic capture, and high-performance routing for electronic design automation.
PP
PADS ProfessionalRead Only
Subscription / Perpetual · Windows · ★ 0.0
Siemens EDA's comprehensive PCB design solution for mid-to-high complexity designs with advanced simulation and analysis capabilities.

Showing top 20 products. Click to show remaining 13 tools.

IGES Surface Geometry Exchange Matrix

Standard 1Trimmed Surfaces (Type 144): IGES files frequently split into loose, disconnected trimmed surface patches during export. Run healing algorithms to re-stitch them into solids.

Standard 2NURBS Precision: Ensure your exporting tool is using double-precision float limits to avoid slight spline edge mismatches which prevent solid shell generation.

Standard 3Coordinate Alignment: Export IGES using the absolute coordinate system rather than local user coordinates (UCS) to prevent mechanical assembly component offset errors.

Frequently asked

Should I use IGES or STEP?: STEP is preferred for new work — it carries solid topology and PMI. Use IGES only when exchanging with legacy systems or surface-only workflows (industrial design, shipbuilding).

Need a specific conversion?

Our interactive CAD Matchmaker filters all 90 IGES-compatible platforms against your budget, hardware configuration, and precise parametric drafting needs.

Launch Matchmaker →

Convert, Compress & Inspect IGES Files Online

SLDPRT / CATPart / NX to STEP

STEP Assembly Defeature & Reducer

STEP AP214 vs AP242 Comparator

Full read & write support (57)

Read-only / viewers (33)

Frequently asked

Need a specific conversion?

Other file formats