STL Viewer Online – View 3D Files Free
Open and view STL files directly in your browser. No software needed. Rotate, zoom, and check dimensions instantly.
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Frequently asked questions
- How do I view an STL file online?
- Drop your STL file on the drop zone or click to upload. The tool loads the file in your browser and displays a 3D preview. You can rotate (left drag), zoom (scroll), and pan (right drag). Triangle count and dimensions are shown below. No data is sent to any server.
- Are my files sent to a server?
- No. The STL file is read and rendered entirely in your browser using Three.js. Your file never leaves your device.
- What STL formats are supported?
- Both ASCII and binary STL files are supported. The tool detects the format automatically.