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3D Model Converter

Free online 3D model converter. Upload your file, choose the target format, and download the result instantly.

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About This Tool

A universal 3D model format converter. Supports GLB, GLTF, OBJ, FBX, STL, 3MF, STEP/STP, PLY, USDZ, 3DS, and DAE. Upload any supported format, choose your target format, and convert with options like texture embedding and coordinate system conversion. Every conversion happens locally in your browser and no files are uploaded.

Tips

  • 1Supports conversion between 10+ 3D formats
  • 2Automatic input format detection
  • 3Real-time 3D preview

How to Use

  1. 01

    Select 3D Source File

    Upload any supported 3D format into the universal converter workspace.

  2. 02

    Choose Target Format

    Pick GLB, STL, OBJ, FBX, 3MF, or STEP depending on your destination workflow.

  3. 03

    Adjust Output Options

    Configure format-specific parameters such as binary encoding, MTL, or precision.

  4. 04

    Download Converted Model

    Preview the converted geometry in the viewport and download the output file.

About Configuration Options

Output Format

OptionWhat it doesDefault / range

Output format

Choose the target 3D format. You can switch formats and re-convert after upload without re-uploading.

GLB · GLTF · OBJ · STL · FBX · 3MF · STEP · STP · PLY · USDZ

GLB

General Settings

OptionWhat it doesDefault / range

Up axis

Determines the 'up' axis of the exported model. Different 3D software uses different conventions. Selecting the wrong system may cause the model to lie on its side.
  • Y-upRecommended: Convention used by OpenGL, Three.js, and most Web 3D engines. Choose this for models from web or game engines.
  • Z-up: Convention used by Blender (default), 3ds Max, and some CAD software. Try this if the model appears sideways.
Y-up

Rotation X

Rotate the model around the X axis (degrees). Useful for correcting axis misalignment or print orientation.0°-180° – 180°

Rotation Y

Rotate the model around the Y axis (degrees). Useful for correcting axis misalignment or print orientation.0°-180° – 180°

Rotation Z

Rotate the model around the Z axis (degrees). Useful for correcting axis misalignment or print orientation.0°-180° – 180°

Rotation Application

Choose how rotation is written to the exported model. Baking into vertices rewrites all vertex coordinates so every export format (including geometry-only formats such as STL and STEP) applies it consistently; root node transform keeps the original vertex coordinates, which is friendlier to animated or skinned models, but formats that ignore node transforms (such as STEP) won't apply the rotation.
  • Bake into vertices: Rotation is written into all vertex coordinates and applies consistently to every export format; geometry data is rewritten.
  • Root node transformRecommended: Rotation is written as a root node transform while vertex coordinates stay unchanged; better for skinned or animated models, but formats that ignore node transforms (such as STEP) won't apply it.
Root node transform

GLTF Output Settings

OptionWhat it doesDefault / range

Resource Mode

Choose how textures and buffers are organized in the output.
  • SeparatedRecommended: Export .gltf, .bin, and texture files separately. Suitable for editing individual resources.
  • Embedded: Embed all resources as Base64 data URIs in a single .gltf file. Simpler distribution but larger size.
Separated

OBJ Output Settings

OptionWhat it doesDefault / range

Export MTL

Include a material definition file (.mtl) referencing texture images.
  • Export MTLRecommended: Generates an .mtl file with material definitions and texture references. Recommended for editing in 3D software.
  • Geometry only: Output only the .obj geometry file without materials. Simpler but no material information.
Export MTL

Frequently Asked Questions

View all FAQs

About this tool

What formats can I convert between?

You can convert between GLB, GLTF, OBJ, FBX, STL, 3MF, STEP, STP, PLY, and USDZ. Upload any supported format, including 3DS, and choose your desired output.

Will textures and materials be preserved?

Texture and material preservation depends on the target format. GLB and GLTF fully support textures and materials. STL only preserves geometry.

Can I convert to multiple formats?

Yes. After uploading, you can switch between output formats without re-uploading. Each format change triggers a new conversion.

Can I convert between any two formats?

Yes, every supported format can be converted to any other supported format. Formats such as STEP/STP are tessellated into meshes during conversion, so the result is a mesh approximation rather than the original parametric geometry.

Are vertex colors preserved during conversion?

Formats that support vertex colors, such as GLB, GLTF, and 3MF, keep them during conversion. OBJ stores material colors in its MTL file. Formats without color support, such as STL, keep geometry only and drop all color data.

Can I convert multiple files at once?

One model at a time. If you select several files, a dialog lists up to 20 of them so you can pick the one to convert. ZIP archives with a model and its companion files are unpacked automatically. To convert many models with the same settings, use Batch Model Conversion, which takes up to 50 models per batch.

General questions

Is Any3D free?

Core features are free forever. Format conversion, model optimization, and online preview do not require an account. Some advanced features are paid.

Are my files uploaded to your servers?

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.

Do I need to install software?

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.

Is there a file size limit?

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.