CAD & 3D
STL Viewer
View STL files online in an interactive 3D viewer. Rotate, zoom, inspect dimensions, and analyze your model directly in your browser.
Tool
View STL files online in an interactive 3D viewer. Rotate, zoom, inspect dimensions, and analyze your model directly in your browser.
This tool runs in your browser. Your input is processed locally and is not uploaded.
About this Tool
Use this free online STL Viewer to open and inspect STL files without installing CAD or 3D modeling software. Rotate the model, zoom into details, switch between solid and wireframe views, inspect its dimensions, and review the geometry before printing, sharing, or converting it. All processing takes place directly in your browser, so your STL file does not need to be uploaded to a server.
Examples
- cube-ascii.stl
- cube-binary.stl
Frequently Asked Questions
What is an STL file?
An STL file represents the surface of a 3D model as a collection of triangles. It is widely used for 3D printing, rapid prototyping, and exchanging mesh-based models.
Can I rotate and zoom the STL model?
Yes. You can rotate the model freely, zoom in and out, and inspect it from different angles in the interactive 3D viewer.
Does the viewer support binary and ASCII STL files?
Yes. The viewer supports both common STL encodings: binary STL and ASCII STL.
Can I see the dimensions of the model?
Yes. The tool can calculate the model’s bounding dimensions based on the coordinates stored in the STL file. STL files do not store an explicit unit, so the displayed values use the file’s original coordinate scale.
Is my STL file uploaded?
No. The model is processed locally in your browser and does not need to be sent to a server.