View STL files online in your browser
STL Viewer opens your 3D printing files directly in your browser – free, secure, and no upload required. Rotate, zoom, measure. On your computer and mobile phone.
Why STL Viewer?
Your data stays with you
Your STL file is rendered exclusively locally in your browser. No server, no upload, no accounts.
Ready to use instantly
No installation, no plugin. Just drag and drop your file, and you're done. Also works on the go, on your smartphone.
Dimensions & Volume
See immediately how large your model is (X/Y/Z in millimeters) and how much volume it occupies.
Touch Controls
Rotate with your finger, zoom with a pinch gesture. Full functionality also on your mobile phone.
Clear Views
Front, Top, Side, Iso – switch to your desired perspective with a click. Wireframe and background toggleable.
Free & Ad-Free
No cookies, no tracking, no ads. Just do what you came here to do.
More on the topic
Instructions
Step by step: open, rotate, and measure STL files.
What is an STL file?
Format, history, strengths, and limitations explained.
3D Printing Workflow
From STL to the finished print – the entire process.
Repair STL
Common mesh errors and which tools really help.
Slicer Software
Cura, PrusaSlicer, OrcaSlicer & Co. at a glance.
STL vs. OBJ vs. 3MF vs. STEP
Which 3D file format is right for what?