Online STL Viewer | Free 3D STL File Viewer
View STL files directly in your browser. Rotate, zoom, inspect, wireframe mode, screenshot, and model information. Nothing is uploaded to any server.
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Frequently asked questions
What is an STL file?
STL (Stereolithography) is a widely used triangular mesh format for 3D printing and CAD models.
Is the STL Viewer free?
Yes. It is completely free with no sign-up required.
Are STL files uploaded to a server?
No. All processing runs in your browser and is never sent to or stored on a server.
Can I use it on mobile?
Yes. Touch controls support rotate, zoom, and pan on phones and tablets.
Can I view 3D printer STL files?
Yes. Both binary and ASCII STL are supported, ideal for 3D printing previews.
Is there a file size limit?
The recommended maximum is 100MB. Larger files may be slower depending on your device.