Free 3D Model File Converter

Free, instant, browser-based. No login needed. Files never leave your device. Just drag and drop your image or 3D model file to convert it to any popular format. (OBJ/STL/GLB/DXF/USDZ/GLTF/PLY/3MF)

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Max file size: 50 MB

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Select the original format of your file and the desired format you wish to convert to before uploading.

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Popular 3D File Converters

Everything You Need to Convert 3D Files

Popular file formats support

Work seamlessly with industry-standard formats including OBJ, USDZ, STL, GLTF, and more. Eliminate compatibility barriers between different 3D applications with comprehensive format conversion options.

Free to all 3D creators

Access professional-grade conversion technology at zero cost. We’ve removed financial barriers to empower students, indie developers, hobbyists, and professional studios with enterprise-level 3D conversion tools.

Insanely fast

Transform complex models in seconds rather than minutes with our optimized algorithms. Experience conversion speeds up to 10× faster than traditional desktop applications, accelerating your production workflow.

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Your intellectual property remains secure. Files are processed at client side and will never leave your browser or uploaded to our server, ensuring complete confidentiality.

How to Convert 3D File Formats

Frequently Asked Questions

Meshy's 3D file converter is built for 3D workflows. It runs entirely in your browser — no installs, no signups required — and preserves geometry, materials, and mesh structure during conversion. Whether you're preparing game assets, 3D printing, or 3D Animation, Meshy handles the format handoff cleanly, so you can stay focused on creating. Not sure which format fits your use case? Check out our 3D file format guide.

Free users can convert one file at a time. Pro users can process multiple files in a single session with faster turnaround. If you need batch conversion for a larger pipeline, check out Meshy's API for programmatic access.

Yes. Your files are processed locally in your browser and are not sent to or stored on external servers. If you're working with sensitive or proprietary models, see our Privacy Policy for full details.

Most conversions complete in under 30 seconds. Conversion time depends on file size and mesh complexity. Very large files or models with high polygon counts may take slightly longer. If processing takes more than a few minutes, try reducing the polygon count before uploading.

Before converting, keep these in mind: Data loss between formats — the target format may not support certain material channels, animation rigs, or metadata present in the source format. Review our 3D file format guide to understand what each format supports before converting. Watertight geometry for 3D printing — If you plan to use the output for 3D printing, check that your model is manifold (watertight) before uploading. External textures — Textures referenced externally may need to be packed or re-linked after conversion. Meshy automatically transfers embedded textures, but external texture files require manual processing. Scale units — Different formats sometimes use different default unit systems. Review your model's scale after conversion, especially if importing into a game engine like Unity or Unreal Engine.

Meshy's converter accurately transfers geometry, face normals, UV coordinates, and basic material properties. Format-specific features that have no equivalent in the target format will be approximated or omitted. For production-critical assets, we recommend spot-checking the converted file in your target application before integrating it into a larger pipeline.

After downloading your converted file, verify: 1. Geometry is intact with no missing faces or flipped normals 2. Textures and materials are applied correctly 3. Scale and orientation match your target application or engine 4. The file opens without errors in your target software

Yes. Once converted, you can use your file directly with other Meshy tools — including the AI Texture Generator to apply new surface materials, the 3D Viewer to check your model, and the retopology and remesh features available in the Meshy workspace. The converted file is compatible with the full Meshy 3D pipeline.

If your conversion fails, try the following steps: 1. Make sure your file is not corrupted — open it in another application to verify 2. Check that the file is within the 50 MB size limit 3. Remove any non-standard or proprietary data before re-uploading

Vertex color preservation across formats:

GLB / glTF — full support (COLOR_0 attribute). Native.
PLY — full support, used heavily in scanning workflows.
FBX — supported but inconsistent across versions / exporters. Some FBX consumers ignore vertex colors.
OBJ — limited support. Standard OBJ doesn't have vertex colors; some extensions add them but most importers ignore.
STL — no support. Geometry only.
3MF — supports per-face/vertex colors and is the right print-format choice when colors must survive.

When converting from GLB:

Printer with color support (Bambu AMS, Prusa MMU): export 3MF directly from Meshy.
Renderer / engine: keep GLB. Don't convert to OBJ.
Research/scanning workflow: PLY.
FBX-only destination: convert via Blender, verify vertex color export setting in the FBX export dialog.

Meshy exports GLB, FBX, OBJ, USDZ, STL, 3MF directly from the same task — pick the format that keeps the data your destination needs.

Unit consistency depends on explicit unit handling at conversion time. Reliable approaches:

Meshy's export — download multiple formats from the same task. All come from the same internal mesh, so scale and orientation match across GLB/OBJ/STL.
Blender — File → Import, then Scene Properties → Units → Length: Millimeters or Meters. Re-export with consistent units across formats. Reliable for batch work via scripting.
gltf-transform CLI — preserves units of source GLB; doesn't re-scale. Good for GLB → optimized GLB.
Assimp library — programmatic conversion with unit awareness; good for custom pipelines.

Avoid converters that don't expose unit settings — they often default to "as-is" which leads to silent unit drift.

Standard practice: Pick mm or meters as your project default. Ensure every export step uses that unit. Re-import to validate; bounding-box dimensions should match expectations. STL is unitless — apply your unit convention consistently when slicing or scaling.

Free options:

Blender — $0 desktop app, imports/exports virtually any 3D format, scriptable; learning curve is real.
Online converters (Online-Convert, FreeFileConvert) — $0, web-based, basic STL/OBJ/GLB conversions, file-size limits.
Microsoft 3D Builder — $0, basic mesh repair + format conversion (STL/OBJ/3MF).
gltf-transform CLI — $0, scriptable for GLB optimization and format swaps.

Paid converters / pipelines:

Meshy — Free tier (limited credits) → ~$20/mo Pro. Not just a converter — generates models from text/image, multi-format export (GLB, FBX, OBJ, STL, USDZ, BLEND, 3MF), Remesh, AI Texturing, Animate. ROI is in generation + conversion combined.
Spin 3D Mesh Converter — ~$30 one-time, 50+ formats, batch conversion.
Polygon Cruncher — ~$200, mesh optimization + conversion.
RapidPipeline (DGG) — enterprise, automated optimization + format conversion at scale.

What paid tiers deliver over free:

Batch processing
Higher file-size limits
PBR material preservation across format swaps
Automated optimization (decimation, Draco compression)
Commercial-use licenses and API access

For pure conversion of <100 files/year, Blender + gltf-transform CLI is enough. For scale, automation, or generation alongside conversion, Meshy's Pro tier replaces 3–4 separate tools.

GLB → OBJ with consistent scale and orientation:

Cleanest path — re-export from Meshy. The same task that produced the GLB also exports OBJ; both come from the same internal mesh, so scale and orientation match.
If you only have the GLB, use Blender:
- File → Import → glTF 2.0 (.glb / .gltf). Confirm the model loads at the expected scale.
- File → Export → Wavefront (.obj). In the export dialog, set Forward = -Z and Up = Y to match GLB conventions. Set Scale = 1.
- This preserves scale and the GLB's Y-up coordinate system in the OBJ.
Watch for unit conversions — Blender works in meters; OBJ has no unit metadata. Verify scale post-import in your target program.
Materials — OBJ + MTL doesn't carry PBR. Textures will export, but the metalness/roughness won't survive. For PBR fidelity, stay in GLB.

For batch conversions, command-line tools like gltf-pipeline + custom scripts work, but the Blender path is most reliable for one-offs.