3D Model Converter

Inspect and convert verified STL, OBJ, PLY, glTF 2.0, and GLB pairs with explicit fidelity reporting.

3D model file

Upload STL, PLY, or GLB directly. Use a ZIP for OBJ/MTL/textures or glTF resources. Direct self-contained OBJ and glTF files are also accepted. Limit: 1 GB.

Source format

Read-only inspection

Conversion options

Output format

STL encoding

Coordinate axis

Unit scaling

Resource delivery

Triangulate geometry (always applied when the target requires triangles) Generate smooth normals when missing

What each format can retain

STL contains triangle geometry only. OBJ/MTL adds UVs, normals, simple materials, and external textures. PLY commonly stores geometry and vertex properties. glTF and GLB can retain modern scenes, PBR materials, skins, morph targets, and animation when the engine can represent them.

No repair or quality reduction claims

Conversion does not claim to repair a model, make it watertight, preserve CAD precision, or make it ready for 3D printing. Geometry is never decimated and textures are never resized to control server load.

3D Model Converter

Inspect supported 3D model packages and convert verified STL, OBJ, PLY, glTF 2.0, or GLB pairs.

Input: One supported model file plus any contained local resources.
Output: The selected model format and a fidelity report.
Real limitations: Encrypted archives, external network resources, unsupported material features, and malformed geometry are rejected rather than guessed.
Privacy and data handling: one supported model file plus any contained local resources is uploaded to a compatible Convertr worker only after you start the operation. Processing is automated, and temporary source and result files are deleted automatically after processing rather than retained as permanent storage.

How to use this tool

Choose one supported model file plus any contained local resources and wait for the page to validate it.
Set the available output or inspection options, then start processing.
Review the reported result and download the selected model format and a fidelity report before the temporary link expires.

Common failure modes

A conversion can fail when a glTF references a missing texture, a package escapes its directory, or the selected source and target pair is not supported.

Useful example

Upload a self-contained GLB and select glTF to receive a JSON model, extracted resources, and a report of preserved or changed features.