STLPad

STL Dimensions Checker

STL DIMENSIONS CHECKER

Measure STL dimensions online

Load an STL to measure its X, Y and Z bounding-box dimensions and triangle count. Your file stays in this browser and is not uploaded.

Drop an STL file here or choose a file from your device Binary and ASCII STL · up to 150 MB · processed locally

Measure the size of an STL file

The dimensions result shows the model's bounding-box size along X, Y and Z, plus the triangle count. STL files normally do not include reliable unit metadata, so STLPad assumes the coordinates represent millimeters.

Use these dimensions to check scale before importing the model into a slicer. For a visual inspection, open the file in the STL Viewer, or calculate its enclosed volume with the STL Volume Calculator.

Private browser-based measurement

Your selected STL is read and analyzed locally in your browser. No account is required and the file is not uploaded. To review open or non-manifold geometry, use STL Checker.