STEP File Viewer
Open STEP/STP files (AP203/AP214/AP242) in your browser — orbit, measure, annotate, section, explode assemblies and screenshot; cancellable parsing for large files. Free, no upload, no sign-up.
Processing and data safety
Section titled “Processing and data safety”This tool runs entirely in your browser (local WebAssembly) — your files are never uploaded to a server.
Input and output
Section titled “Input and output”- Formats: STEP, STP
- Flow: STEP / STP (AP203 / AP214 / AP242) → in-browser view
How to use
Section titled “How to use”- Open a .step or .stp file.
- Orbit and zoom to inspect the model; while a large assembly is parsing you can click Cancel parsing (the previously loaded model is kept).
- Use the toolbar to measure distance/angle, annotate, section or take a screenshot; pick a tessellation preset before dropping for finer edges.
Key details and limits
Section titled “Key details and limits”- Large models are limited by browser memory; very large files may fail to parse — lower the precision or split the assembly. Parsing can be cancelled while running (the previously loaded model is kept).
- View-only — the tool does not export or write STEP files; for mesh output use STEP to STL / STEP to GLB (also tessellated, not exact B-Rep).
- Parsed locally in your browser (OCCT WASM); files are not uploaded.
Common use cases
Section titled “Common use cases”- Drop in a STEP file → inspect the model interactively