Switch the up axis to match your software convention, preview the rotation, and export in the same format.
or click to browse, paste supported
It switches a model's up axis between coordinate conventions: Y-up is common in glTF, Three.js and web or game engines, while Z-up is the convention in Blender, CAD and slicing software. The model is rotated ±90° around X, vertex coordinates are rewritten, and dimensions stay exactly the same. The download keeps the original format. Leave the source axis on Auto to follow the format convention (GLB and OBJ are Y-up, STL, 3MF, and STEP are Z-up), or set it manually when the file's real orientation differs.
| Option | What it does | Default / range |
|---|---|---|
Transform Application | Choose how the transform is applied to the model: by modifying vertices (baked into geometry data) or by modifying the root node transform. Modifying vertices rewrites all vertex coordinates and applies consistently to every export format; modifying the root node keeps the original vertex coordinates, which is friendlier to animated, skinned, or geometry-sensitive workflows. Root node transform is the recommended default.
| Modify root node |
| Option | What it does | Default / range |
|---|---|---|
Source up axis | The up axis the model currently uses. Auto follows the format convention (GLB and OBJ are usually Y-up; STL, 3MF, and STEP are usually Z-up). Set it manually when the file's actual orientation differs from the convention.
| Auto |
Target up axis | The up axis the exported file will use. When it differs from the source, the model rotates ±90° around X with no size change.
| Y-up |
About this tool
The viewer toggle only changes how the model is displayed, so the downloaded file keeps its original coordinates. This tool writes the rotation into the exported file, which then opens with the target convention in other software. Use it before printing or handing off a model.
Rotate 3D Model applies any angle around any axis for manual posing. Adjust Axis performs the single ±90° X rotation that converts between Y-up and Z-up, so you do not have to work out the angle yourself.
The math is identical, a ±90° rotation around X, but the converter also changes the file format, for example STL to GLB. Adjust Axis keeps the original format and only rewrites the coordinate convention.
Y-up is standard in OpenGL, Three.js, glTF/GLB workflows, and most game engines. Z-up is the Blender default and is common in 3ds Max, CAD, and 3D printing slicers. This site treats STL, 3MF, and STEP as Z-up.
The file's actual orientation probably differs from its format convention, for example an STL exported as Y-up. Set the source up axis from Auto to Y-up or Z-up and export again.
No. Rotation preserves all distances, proportions, and precision, and no unit conversion is involved. To place the model on the print bed afterwards, run the Drop to Ground tool.
Same tradeoff as the other transforms. Modifying vertices writes the rotation into every coordinate, so geometry-only formats such as STL and 3MF apply it. Modifying the root node keeps the original vertices, which suits animated or hierarchical models, but formats that ignore node transforms, such as STEP, will not follow.
General questions
Core features are free forever. Format conversion, model optimization, and online preview do not require an account. Some advanced features are paid.
No. Files you select are processed only in your browser on this device, so they never leave your device and are never sent to our servers. We don't store any user files; after processing, related data in browser memory is released.
No installation required. Any3D is entirely browser-based; just open the webpage to use all features. It works on Windows, Mac, Linux, and other major operating systems.
There is no cap on file size or polygon count. How large a model you can open depends on your device's memory and graphics card, and very heavy models may make the page lag or crash. Some tools do limit how many files go in at once, such as 50 models per batch or single images up to 50 MB in texture compression. See Limits for the full list.
