Blender File Converter: OBJ, FBX, USD, STL and More

Updated 5 November 2026 · Standard formula, shown below

Yes. Blender can import and export many common 3D file formats, including OBJ, FBX, USD, and STL, so it can serve as a file converter for supported workflows. You choose an import format, open the model, check how it came in, then export it in a format the receiving app or service accepts; conversion is not always a perfect one-click translation.

What Blender Can Convert

Blender’s file support covers several kinds of 3D data, but each format is designed to carry different information. Available choices can vary with Blender version, enabled add-ons, and the operating system. Look in the application’s File > Import and File > Export menus to see the formats available in your installation.

OBJ: A widely used format for polygon meshes. OBJ files can be accompanied by an MTL material file and separate image textures. It is useful for exchanging geometry and basic material references, but it does not preserve every Blender-specific feature.
FBX: Common in animation, game, and 3D-content pipelines. It can carry meshes, transforms, materials, armatures, and animation, but results depend on export settings and how the destination software interprets them.
USD: A family of scene-description formats used to exchange or assemble complex 3D scenes. Blender’s USD import and export options support useful scene data, but not every feature in every USD-based pipeline is necessarily preserved.
STL: A mesh format used especially for 3D printing. It describes surface geometry rather than a full Blender scene: expect no normal Blender materials, textures, rigging, or animation in the exported STL.
Other formats: Depending on the build and available importers or exporters, Blender also supports formats such as PLY, SVG for certain workflows, and glTF 2.0, as well as its native .blend files. These formats are not interchangeable: some are for meshes, some for scenes, and some for particular asset pipelines.

How Conversion Works

Blender does not simply change a file’s extension. It reads data from the source format into Blender’s scene model, then writes selected scene data according to the target exporter. The conversion can only retain information that both the source importer understands and the destination format can represent.

For example, importing an OBJ generally gives you mesh geometry and may connect material references and textures if the related files are present. Exporting that scene as STL keeps the surface mesh but drops texture-based appearance and animation. Moving a rigged character through FBX may preserve bones and animation when settings align, while a static mesh format cannot carry that rig in the same way.

In practical terms, the usual workflow is:

Save a copy of the original project or source files. For formats that use companion files, keep the whole folder together.
Choose File > Import and select the source format. Set options such as scale, axis orientation, animation, or materials when relevant.
Inspect the imported object in the viewport and, when needed, in the Outliner. Check its dimensions, orientation, materials, object hierarchy, and animation.
Make any needed corrections, then choose File > Export and select the destination format.
Set the export scope and options, choose a destination folder, and export. Reopen the exported file in Blender or the intended destination application to verify it.

Preparing a Reliable Export

Before exporting, decide what the next application needs. A model for printing is different from a character intended for animation, and a scene handoff may need cameras, lights, materials, or a hierarchy that a simple mesh exchange does not include.

Check units and scale. Blender’s scene units and an exporter’s scale settings can affect apparent size. Confirm dimensions in the destination app, especially for manufacturing or 3D printing.
Check orientation. Apps can use different up-axis conventions. Exporters often provide axis options; use the destination’s documentation or a known-good sample to choose them.
Choose objects deliberately. Some export dialogs can export only selected objects. Others may include the whole scene. Verify the selection and scope before writing the file.
Handle textures intentionally. Keep image files with the project, use a supported material workflow, and check whether the exporter embeds images or refers to external paths. A model file may not contain its textures.
Prepare mesh geometry where needed. For STL, check that the mesh is suitable for the intended printing workflow, including whether it is closed and has consistent geometry. Blender can help inspect and edit a mesh, but export alone does not guarantee a printable result.
Preserve the editable source. Keep the .blend file or original files alongside the interchange export. A converted file may lose settings and data that are important for later edits.

Common Conversion Problems

The model is too large, too small, or rotated. This commonly comes from mismatched units or axis conventions. Check the import and export settings, then compare a known dimension rather than judging only by viewport appearance.

Textures are missing. OBJ materials, for instance, may reference external image files using paths that are no longer valid. Keep companion files together, relink images in Blender when needed, and confirm how the target format handles texture paths or embedding.

Materials look different. Shaders are not universally portable. A complex Blender material may have no direct equivalent in a simpler interchange format, so the destination may show a basic material or require rebuilding the shader there. Test a small export before converting a large asset library.

Animation or rigging disappears. The chosen target may not support it, or export settings may exclude it. Verify that the format supports the required data and that the relevant objects, actions, and export options are included.

The export fails or a format is missing. Check the File menus and the documentation for your Blender version. Some importers and exporters are optional or version-dependent. Do not assume a renamed extension converts a file: use a real importer and exporter for the formats involved.

Choosing the Right Format

Pick the target based on what the receiving tool needs, not on which extension sounds most universal. OBJ is practical for straightforward mesh exchange; FBX is often selected for rigs and animation; USD is designed for scene-description and collaborative pipelines; and STL is suited to surface geometry for printing. For web or real-time asset delivery, glTF may be a better fit when the recipient supports it.

There is no lossless format conversion for every kind of 3D project. Blender’s native .blend file is the best choice for preserving a Blender project’s editable scene, but other applications may not read it. Interchange formats improve compatibility at the cost of potentially dropping features. If the receiving application has a recommended format and settings, follow those instructions and test the handoff before relying on it.

Frequently Asked Questions

Can Blender convert OBJ to FBX?
Yes. Import the OBJ, check its geometry and materials, then export the scene or selected objects as FBX. OBJ does not contain rigging or animation to transfer, so those elements would need to be added separately.

Can Blender convert FBX to USD?
Blender can import FBX and export USD in versions with the relevant format support. Inspect the result carefully because material, animation, hierarchy, and other feature support can differ between formats and pipelines.

Can Blender convert a model to STL?
Yes. Import the model and export the relevant mesh as STL. STL is primarily geometry, so it does not preserve Blender materials, textures, or animation; check the mesh and scale for your intended use.

Does Blender preserve textures when converting files?
Sometimes, depending on the source, target, and export options. Textures may be external files, may need relinking, or may not map cleanly to the destination’s material system. Verify the exported asset in the receiving application.

Can Blender open every 3D file format?
No. Support is limited to formats provided by Blender’s built-in tools and any compatible importers or exporters available for that installation. If a format is absent, check current Blender documentation or use a converter that explicitly supports it.

Is changing a file extension enough to convert a 3D model?
No. An extension only labels a file; it does not rewrite the file’s contents. Import the source with a compatible importer and export through the appropriate format exporter.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.