STL Viewer
View a 3D-printable STL model right in your browser.
Drag and drop an STL file, or click to choose one
Supports both binary and ASCII STL files
Usage examples
Previewing a model before 3D printing
Spin the model around in your browser to confirm an STL file looks right before loading it into a slicer.
Quickly opening a 3D model file you received
Open a shared STL file right away to check its shape, without installing dedicated 3D software.
Checking model size and polygon count
Check the model's overall dimensions (X/Y/Z) and triangle count to gauge whether the print size is reasonable and the file isn't overly heavy.
Frequently asked questions
Is my uploaded file sent to a server?
No. Reading and rendering the file happens entirely in your browser and is never sent to a server.
Does it support both binary and ASCII STL?
Yes. Both formats are automatically detected and handled.
Can I rotate the model with my mouse?
Yes. Drag to rotate, scroll to zoom, and right-click-drag (or two-finger drag) to pan.
Does it support colored STL files?
Some binary STL files carry color data, but this tool focuses on checking shape and displays everything in a single color.