Free STL Viewer Online - Open STL Files

Drag and drop your 3D model here, or click to browse

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Supports: STL • Preview only • Max size: 100 MB

STL Viewer

STL viewing is geometry-first and may not include full advanced material behavior from richer formats.

Use cases

Open STL assets before engine import, conversion, or client handoff.
Check orientation, scale, geometry readability, and common material behavior in-browser.
Preview the asset before sending it to a converter, inspector, or AI texturing workflow.

Supported files

STL

Preview only. Maximum upload size is 100 MB.

Limitations

STL preview quality depends on the source file, embedded assets, and external texture references.
This page is for previewing, not editing geometry or authoring new materials.
Use the inspector for technical statistics and the converter when you need another export format.

Example workflows

Need technical stats?

Done previewing? Convert your STL

Current tool guide

STL viewer: best use cases

Use this STL viewer for fast in-browser preview before conversion, optimization, or engine import.

FAQ

How do I view STL files online?

Upload your file and the viewer renders it directly in your browser so you can rotate, zoom, and inspect the model.

Is this 3D viewer free and private?

Yes. The viewer is free to use and runs in-browser without signup or mandatory server upload.

Can I use this viewer before converting formats?

Yes. View the model first, then use the TextureFast converter pages to convert into your required target format.