any STEP free

  • View
  • Inspect
  • Validate
  • AI-Ready

Why Open STEP Viewer

  • Work with AI

    Connect your AI agent to the model open in the viewer

  • Validate

    Ensure geometry accuracy before production.

  • Stay secure

    Keep sensitive CAD data local – no uploads to external servers.

  • Free

    No license fees

  • Save time

    Load and review even large STEP files in seconds.

  • Work anywhere

    Cross-platform compatibility

    • professional-grade viewer
    • lightweight
    • free
    • heavy CAD software
    • costs

Supported formats versions

  • STEP

    • AP 214
    • AP 242 ed.3
    • AP 203
    • Domain Model (StepX)

  • IGES 5.3

  • QIF3

Features

  • MCP Server

    MCP Server

    • Connect your AI agent
      to the open model
  • Full 3D visualization

    Full 3D visualization

    • zoom
    • pan
    • 3D rotate and visual styles
  • Clash Detection

    Clash Detection

    • Detect clashes in a model
  • Measurement

    Measurement

    • Measure distances
      between points
      with snapping
  • Selection & Property Inspection

    Selection & Property Inspection

    Isolate/hide selected
    objects

  • Expandable model hierarchy tree

    Expandable model hierarchy tree

  • Publish

    Publish

    any STEP model to 3D PDF

  • Validation

    Validation

    SDAI (ISO-10303) and Step
    Physical File syntax validation

  • Section Planes

    Section Planes

    For detailed model
    inspection

  • TreeView plugin

    TreeView plugin

    For SDAI model exploration and debugging

STEP Forward Partnership

For manufacturers and supply chain leaders: Solve your STEP challenges with confidence.

Learn More

AI-ready Try oda mcp servers

Open STEP Viewer includes a built-in MCP server. Connect your AI agent to the open model and let it explore the building, read property sets, analyze geometry and add walls, doors or furniture.

Need the same for your own IFC, STEP or DWG files, or inside your own product? That is what ODA MCP Servers are for.

How to set up Discover ODA MCP Servers

Roadmap

  • 2024

      • Workplanes for Measurements — Support measurement tools with defined workplanes.

      • Fly Camera Mode — Enable free-fly camera navigation.

      • Query Plugin for Tree View — Search for objects by attribute values.

      • Layers Manager — Manage STEP layers if available
        in the file.

      • Extended UIDs Support — Support unique identifiers
        for StepX files.

      • Holes Visualization —
        Visualize hole details
        in models.

      • User-Defined Properties — Display custom properties
        in the Properties Tab.

      • Custom AP242 Schemas — Support user-defined AP242 schemas.

      • Shell Viewer and Curve Dump Plugins — Tools for shell
        and curve analysis.

      • BRep Analyzer Plugin — Compare body topology using UUID data, integrated with Tree View.

  • 2025

      • Angle Measurement — Add tools for measuring angles.

      • Japanese and German viewer versions release.

  • 2026

      • MCP Server — Connect AI agents to the open model via the Model Context Protocol.

Download

  • Windows x64
  • macOS 64
  • macOS arm64
  • Linux

by Open Design Alliance

ODA creates SDKs for building complex CAD & BIM applications quickly and easily.
Since 1998.

Learn more