Free STEP Viewer Online

Open STEP files online with Hyper3D Viewer. Preview CAD exchange 3D models locally with no software install.

Supported formats

STEP

OBJ FBX USDZ STL GLB GLTF 3MF PLY DAE 3DS 3DM STEP STP IGES IFC

Local history

Uploaded models will appear here.

Trusted by creators and teams

Local browser preview No account required Up to 200MB

Have you tried Hyper3D?

Generate 3D models from text or images, and export for games, products, and 3D printing.

Convert

Move 3D models seamlessly between browser-supported formats.

Preview

Inspect both source and converted files directly online.

Generate

Create new 3D assets from text descriptions or uploaded images.

Start for Free

Popular STEP Viewer Workflows

Preview STEP files for CAD exchange workflows before importing them into another 3D, CAD, print, or real-time tool.

Games

Game Asset Review

Open FBX, OBJ, GLB, GLTF, and texture-heavy assets before bringing them into Unity, Unreal Engine, or a DCC tool.

AR and Product Preview

Inspect USDZ, GLB, and GLTF product models for e-commerce, AR previews, configurators, and stakeholder reviews.

3D Printing Checks

Preview STL, 3MF, OBJ, and PLY files before slicing so you can catch orientation, scale, and mesh visibility issues earlier.

CAD

CAD and BIM Review

Open STEP, STP, IGES, 3DM, and IFC files for quick browser-based product, architecture, and engineering review.

What You Can Check in Hyper3D Viewer

Use the viewer before import, review, conversion, publishing, or AI generation.

Geometry Preview

Open 3D assets in the browser to check mesh visibility, object scale, orientation, and basic scene structure.

Material & Texture

Upload companion material, texture, or binary files when the format references them, then inspect if the preview resolves correctly.

Format Handoff

Use the viewer before moving files into Blender, Unity, Unreal Engine, CAD tools, AR viewers, slicers, or ecommerce pipelines.

Local File Privacy

Preview files in the browser and keep recent uploads in local device history without creating an account for basic viewing.

How to View 3D Models Online

Choose a format, upload your file, inspect it in the modal viewer, and reopen recent uploads from local browser history.

STEP Viewer FAQ

Answers for creators, developers, product teams, print users, and 3D artists working with model files in the browser.

How do I open a STEP file online?

Select the STEP viewer, upload your file, and the preview opens in a browser modal. You can rotate, zoom, inspect the model, and reopen it later from local history.

Are uploaded files sent to Hyper3D servers?

No. The viewer reads files in your browser and stores upload history in local IndexedDB on this device. The model preview does not require a server upload.

Can the viewer load textures and companion files?

Yes, when the format references companion files, upload the model together with related MTL, BIN, or texture files. Embedded texture formats such as GLB are usually the most portable.

Why does my model appear blank or untextured?

The file may be missing companion texture files, use unsupported material settings, contain inverted normals, or be too heavy for the current device. Try a simpler export or pack textures into GLB.

Which 3D formats does Hyper3D Viewer support?

The viewer supports OBJ, FBX, USDZ, STL, GLB, GLTF, 3MF, PLY, DAE, 3DS, 3DM, STEP, STP, IGES, and IFC for common web, game, AR, print, CAD, and BIM workflows.