Free Online 3D File Viewer

Open 3D models for a local browser preview. If local conversion fails or the export is unavailable in the browser, conversion automatically switches to the server with a private upload; sign-in is required.

Popular Online 3D Viewers

Multi-Format 3D Model Preview

Only data supported by the target format can be exported. Check dimensions, materials and animation in the result before using it in another application.

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No Software Needed — View on Any Device

Local previews and browser conversions keep file processing on your device. If local conversion fails or requires the server, the model is automatically uploaded to private storage; temporary uploads and results are cleaned up after 24 hours.

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How to View 3D Files Online

Local file previews stay in your browser without sign-in. Supported formats are converted in your browser first, including large models. Conversion automatically switches to the server with a private upload if local conversion fails, or for FBX and USDZ with skins or animation. Server conversion requires sign-in.

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Upload Your 3D File

Drag and drop your 3D file into the viewer or click to browse. We support OBJ, FBX, STL, GLB, GLTF, STEP, STP, PLY, and 3MF — up to 200 MiB.

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Preview in Real-Time

Local file previews stay in your browser without sign-in. Supported formats are converted in your browser first, including large models. Conversion automatically switches to the server with a private upload if local conversion fails, or for FBX and USDZ with skins or animation. Server conversion requires sign-in.

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Inspect & Iterate

Check geometry, textures, and scale before importing to your pipeline. Switch formats or upload another model with a single click.

Why Choose AI 3D Model's Online 3D Viewer?

A fast, private, and truly free 3D file viewer that handles formats other tools can't — including STEP and STP CAD files.

Start Viewing for Free

200 MiB File Support

Upload large, production-grade models up to 200 MiB. No file-size limits that block your workflow — handle game assets, CAD exports, and photogrammetry scans without compression.

9+ Formats Including CAD

View OBJ, FBX, STL, GLB, GLTF, PLY, 3MF, and STEP/STP files. Unlike most online viewers, we support engineering CAD formats natively — no conversion needed.

No additional conversion fee

Open your 3D files directly in the browser. Zero software installation, zero account creation, zero barriers. Just drag, drop, and view.

Automatic private server fallback

Local previews and browser conversions keep file processing on your device. If local conversion fails or requires the server, the model is automatically uploaded to private storage; temporary uploads and results are cleaned up after 24 hours.

Use Cases
Trusted by creators across industries

Who Uses Our Free Online 3D Viewer?

From quick file checks to full design reviews — our viewer helps professionals and hobbyists inspect 3D models without installing software.

  • 3D Printing Enthusiasts

    Preview STL, OBJ, and 3MF files before sending to your printer. Check model orientation, scale, and geometry to avoid failed prints and wasted material.

  • Game Developers

    Quickly review GLB, FBX, and OBJ game assets without opening a full game engine. Perfect for asset QA, team reviews, and freelancer deliverable checks.

  • Product Designers & Engineers

    Open STEP and STP CAD files directly in the browser — no AutoCAD or SolidWorks required. Review mechanical parts, assemblies, and prototypes on the go.

  • Students & Educators

    No expensive 3D software licenses needed. Students can view and study 3D models for coursework, while educators can share interactive 3D content effortlessly.

  • E-Commerce Teams

    Preview product 3D models before embedding them on your storefront. Check textures, lighting, and geometry quality for a polished customer experience.

  • AR/VR Developers

    Validate GLTF and GLB assets for AR/VR experiences. Quick-check models for correct scale, orientation, and material setup before deployment.

User Reviews

Trusted by 3D Professionals Worldwide

Game developers, engineers, and designers rely on our free viewer for quick 3D file checks.

3 verified reviews
  • “Finally a viewer that opens STEP files in the browser. I no longer need to boot SolidWorks just to check a client's CAD model.”

    Alex Torres

    Mechanical Engineer

    Verified user
  • “We use it to QA freelancer 3D assets before importing them into Unity. Drag-and-drop GLB viewing saves us tons of time.”

    Jordan Yip

    Lead Game Developer

    Verified user
  • “The 200MB limit is a game-changer. I can preview photogrammetry scans that choke other online viewers.”

    Nadia Müller

    Photogrammetry Artist

    Verified user

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View Your 3D Files Online — Free, Fast, and Private

Open 3D models for a local browser preview. Conversion has no additional fee. Local file conversion does not require sign-in; server conversion does. Generation usage and existing download entitlements for generated assets still apply.

Trusted by 3D artists, game developers, engineers, and educators worldwide.

Private upload when needed
Up to 200 MiB
Browser first
📐 CAD Support