Question 1

How to open STL files online?

Accepted Answer

Simply drag and drop your STL file onto STLviewers.com or click the 'Select Files' button. Your file will be displayed instantly in your browser without any upload to servers.

Question 2

Is STLviewers.com free?

Accepted Answer

Yes, STLviewers.com is 100% free with no hidden costs. All features including measurement tools, PDF export, and multi-model support are available at no charge.

Question 3

What 3D file formats are supported?

Accepted Answer

STLviewers.com supports STL, OBJ, GLTF, GLB, FBX, 3DS, DAE (Collada), and PLY file formats - covering all major industry standard 3D formats.

Question 4

Are my files uploaded to a server?

Accepted Answer

No, your files never leave your device. All processing is done locally in your browser, ensuring complete privacy and security.