Free STEP viewer and 3D measurement tool for Windows with section view, IGES/STL support, and assembly tree browsing.
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Updated
Jul 29, 2026
Free STEP viewer and 3D measurement tool for Windows with section view, IGES/STL support, and assembly tree browsing.
Free browser-based CAD viewer for STEP, IGES, STL, and more — no signup, no install. Includes automatic 2D engineering drawing generation with true-to-scale PDF export.
STPViewer — A lightweight Windows desktop viewer for STEP / STL / DXF — open a part, measure it, and check how two parts fit together, without firing up a heavyweight CAD suite.
High-performance 3D viewer for STP/STEP/IGES files with batch measurement, auto-screenshots, and Excel quote export. Optimized for CNC and sheet metal manufacturing.
Free browser-based file tools — PDF editor, compare PDF, Gerber & STEP viewer, image tools, OCR. Runs locally on any platform, no upload, works offline. lofttools.com
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