[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"howto:stp:ios:en":3},{"resolvedFromAlias":4,"canonicalExt":5,"ext":5,"name":6,"category":7,"categoryName":8,"updatedAt":9,"os":10,"osLabel":11,"quickSolution":12,"stepByStep":13,"recommendedSoftware":15,"alternativeMethods":16,"commonIssues":17,"securityNote":36,"extensionPath":37,"extensionLabel":38,"breadcrumbs":39,"metaDescription":49},false,"stp","STEP (ISO 10303) Part 21 CAD exchange file","cad","CAD","2026-06-12T08:25:44.397Z","ios","iOS","To open .STP files on iOS, if you don’t have a STEP-capable CAD viewer on iOS, transfer the .stp to a desktop CAD application that supports STEP import (e.g., Autodesk Fusion or SOLIDWORKS).",[14],"If you don’t have a STEP-capable CAD viewer on iOS, transfer the .stp to a desktop CAD application that supports STEP import (e.g., Autodesk Fusion or SOLIDWORKS).",[],[],[18,24,30],{"title":19,"description":20,"steps":21},"Import fails or opens empty (AP/translator mismatch)","Some tools handle certain STEP Application Protocols or entity sets better than others. A file may be valid ISO 10303-21 text but still not import cleanly in a particular CAD system.",[22,23],"Ask the sender to re-export as a different STEP AP commonly supported by importers (SOLIDWORKS notes AP203/AP214/AP242).","Try importing into another STEP-capable CAD tool (e.g., Autodesk Fusion vs. SOLIDWORKS) to confirm whether the issue is tool-specific.",{"title":25,"description":26,"steps":27},"File opens, but geometry is missing or incomplete","Interoperability formats can lose certain features or represent them differently; what comes through depends on how the source system exported the STEP and what the importer supports.",[28,29],"Re-export from the source system with options that preserve needed data (for example, export solids rather than surfaces when possible).","If the receiving tool offers STEP import options, try alternative settings and re-import.",{"title":31,"description":32,"steps":33},"Wrong app association (double-click does nothing useful)","On some systems, .stp may not be associated with a CAD importer/viewer, so double-clicking won’t open it in the right program.",[34,35],"Open your CAD application first, then use its File > Open/Import command and select the .stp file.","Optionally change the file association so .stp opens with your preferred CAD tool.","STEP Part 21 files are clear-text exchange files (ISO 10303-21), so you can inspect them with a text editor; however, large or complex files can still stress viewers/importers.","/file-extension/stp",".STP",[40,43,46],{"label":41,"to":42},"Home","/",{"label":44,"to":45},"How To","/file-extension",{"label":47,"to":48},"Open .STP on iOS","/how-to/open-stp-on-ios","Learn how to open .STP files on iOS with step-by-step instructions, recommended software, and troubleshooting tips."]