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description=Explore OCCT (Open CASCADE Technology) for 3D modeling, visualization and CAD data exchange. Find documentation, downloads and engineering support.;

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Text of the page (random words):
occt open cascade technology skip to content open navigation development tools explore integrate all components sdks supported file formats conversion guides technical articles engineering use cases data exchange wrappers acis import export assimp import c wrapper dxf import export jt import export language wrappers parasolid import step xml reader writer usd import export modeling meshing advanced fillets chamfers advanced hlr advanced mesher bestfit catalog based feature recognition distance clearance analysis express mesh implicit geometry mesh framework parametric sketcher shape healing validation surface from scattered points surface wrapping unfolding automation visualization advanced samples cam library canonical recognition collision detection light web viewer pmi editor pmi view volume rendering services commercial services custom development overview support packages pricing training e learning product maintenance work with our engineers technical assistance architecture consulting bug fixes performance cad integration software development software customization open source occt documentation open cascade technology documentation overview getting started guides user guides c api reference upgrade guides contribution guide community archives developer archive overview forum archive tickets archive applications explore applications applications overview cascadescope end user applications cadrays cad processor cad assistant cad builder company about occt3d company overview industries customer stories customers partners news careers contact occt3d search contact us occt open source c platform open cascade technology occt open cascade technology is an open source c platform for 3d modeling visualization cad data exchange and application development download occt read documentation github repository geometry topology b rep model 01 model and analyze geometry 02 present and exchange data 03 build the product layer 01 model and analyze geometry 02 present and exchange data 03 build the product layer release downloads download occt latest release occt 8 0 1 view 27 releases download occt source code from github choose a release below to find its source archives release notes and any additional packages provided for that version download occt 8 0 1 8 x 3 releases 8 0 1 8 0 0 p1 8 0 0 7 x 19 releases 7 9 3 7 9 2 7 9 1 7 9 0 7 8 1 7 8 0 7 7 2 7 7 1 7 7 0 7 6 3 7 6 2 7 6 1 7 6 0 7 5 0 7 4 0 7 3 0 7 2 0 7 1 0 7 0 0 6 x 5 releases 6 9 0 6 8 0 6 7 0 6 6 0 6 5 0 view release notes and prerelease builds on github a modular c platform an open source cad kernel for c applications open cascade technology often written as opencascade provides c libraries for geometry b rep topology solid modeling visualization data exchange and application data teams can inspect the implementation integrate at toolkit level and keep their own product architecture around the open foundation core capabilities modeling visualization exchange and application data modeling and geometry create inspect transform and repair curves surfaces meshes and boundary representation models curves and surfaces b rep topology boolean and feature operations meshing and shape healing interactive visualization build desktop and embedded 3d experiences with presentation selection clipping and rendering services interactive 3d views selection and highlighting hidden line removal materials and rendering data exchange move precise geometry assemblies names colors and attributes through established engineering formats step and iges mesh and scene formats xde assemblies and metadata shared exchange wrappers application data organize long lived engineering documents with transactions persistence attributes and product structures ocaf documents transactions and undo attributes and persistence application structure explore the occt user guides where occt fits applications that construct analyze or exchange 3d models use occt when the application must do more than display a file it must construct analyze transform exchange or persist engineering models occt specialized cad cam and inspection engineering simulation medical imaging architecture and bim design automation digital twins technical viewers why occt source code license documentation and release history review the platform through its license source code documentation release history and public development record open source terms occt is distributed under lgpl 2 1 with an additional exception review the licence and occt exception supplied with your chosen release read the license native c control integrate at the module or toolkit boundary and keep ownership of the application architecture and user experience technical overview public development inspect changes issues tests and release tags in the same repository used to evolve the platform open the repository professional paths add focused support training maintenance or commercial components without replacing the open foundation explore support developed on github source discussions and issue tracking in one place use github discussions for technical questions and project ideas use github issues for reproducible defects and focused improvement proposals github discussions github issues using occt in a product need a commercial component or engineering support build directly with occt add a devtool or send a bounded technical question with the relevant version and workflow browse devtools ask a technical question occt3d cad sdks 3d software development and engineering services development tools devtools data exchange conversion guides technical articles engineering use cases services custom development support training applications cascadescope end user applications company about careers news industries customer stories contact open source open cascade technology documentation forum archive tickets archive legal privacy policy terms cookie policy privacy requests third party notices 2026 open cascade part of capgemini