Detect broken normals, recalculate from face winding or flip inside-out. Single-sided preview shows black faces clearly.
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These tools bake transforms directly into mesh vertices — unlike preview rotation, changes are preserved on export. Upload a model, apply the transform, verify in the 3D preview, then download.
Recompute vertex normals from face winding. Fixes missing, zero-length, or inverted normals that cause black faces under single-sided lighting. For STL, winding is already the export authority — use Flip if the solid is inside-out.
Invert vertex normals and reverse face winding (inside-out flip). Required for STL black faces caused by reversed winding.
Drag and drop or browse for your 3D file
Use the sidebar panel to apply the desired operation
Rotate and inspect the result in the 3D viewer
Choose output format and download the transformed model
Yes. All operations modify vertex coordinates directly. Preview rotation is for inspection only; exported geometry includes your applied transforms.
Mirror changes mesh geometry only. Textured models may need UV adjustments in external software after mirroring.
STL, OBJ, GLB, 3MF and PLY. Choose the format in the sidebar before downloading.
Yes, Any3D's core features are free to use forever. We provide format conversion, model optimization, and online preview at no cost, with no registration required.
No. Files you select are processed only in your browser on this device—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.
The processing capacity depends on your device performance and the model's vertex count and texture complexity, rather than file size alone. We impose no file size limit, but when a model exceeds what your device can handle, the page may lag or even crash.
