LOCAL FILE WORKBENCH

Edit STL Position, Scale and Rotation

Move, rotate, scale or mirror an STL mesh with a local preview. Review coordinate bounds and export the transformed geometry without uploading your model.

Edit and Scale STL Files OnlineIDLE

No model loaded

Your geometry will appear here.

3D VIEWPORT

03Options

Translation (model units)Translate XTranslate YTranslate Z

Rotation (degrees)Rotate XRotate YRotate Z

Uniform scale

Exact size (model units)

Current dimensions: Load an STL. STL files do not embed physical units.

Lock proportions (enter one size)Target X sizeTarget Y sizeTarget Z size

Quick rotation

X axis

Y axis

Z axis

Convert coordinate units

Explicitly scale STL coordinate numbers. This does not embed a unit in the STL output.

Interpret current coordinates asConvert coordinates to

MirrorCenter at originPlace base at Z=0

Live preview uses the original source. Distances are model units.

04Output

No output yet.

Supported input and output

Binary and ASCII STL → binary STL. All distances are model units; STL has no intrinsic units.

Understand the transform order

Uniform scale and optional mirroring happen first, followed by X, Y and Z rotation, then translation. Centering or base placement is applied last when selected. Mirroring adjusts triangle winding to preserve orientation. Distances remain model-coordinate units, so resizing does not discover or encode the intended physical unit of an STL.

How to use this tool

Select an STL and review its current coordinate bounds.
Adjust scale, mirror, rotation and position while inspecting the live preview.
Apply and export when the placement is correct; use Reset to discard the current workspace.

Limitations to check

Basic mesh transforms, not parametric CAD or feature editing.
Order: uniform scale/mirror, rotate X then Y then Z, translate, then optional centering/base placement.
Mirroring reverses triangle winding to preserve orientation. Export may reject triangles that collapse at STL float32 precision.
Transform-only editing does not run topology diagnostics or repair existing defects. Use STL Mesh Checker for a separate analysis.

File and processing limits

STL input up to 8 MiB; 150,000 stored vertices and 50,000 triangles.
Topology analysis: at most 150,000 edge records and 5 million weld comparisons.
20 seconds per job; generated STL output up to 3 MiB.

Processing happens in this browser; your file and filename are not uploaded. Cancel, reset or replace the file to stop its worker. Downloads are generated locally.