Free · No Signup · 9 Formats

Free Online 3D File Converter

Convert STL, OBJ, FBX, GLTF, GLB, PLY, DAE, AMF & 3MF instantly in your browser. Export to STL, OBJ, GLTF, GLB, PLY, FBX and USDZ — 100% free, private, and no server uploads.

STL OBJ FBX GLTF GLB PLY USDZ DAE AMF 3MF

Click or Drop 3D File Here

STL, OBJ, GLTF, GLB, PLY, FBX, DAE, AMF, 3MF

Convert To

STL

Binary

OBJ

Wavefront

GLTF

JSON

GLB

Binary

PLY

Polygon

USDZ

Apple AR

FBX

Autodesk

Ready — load a 3D file to begin

Transform Before Export

Scale (multiplier)

Rotation (degrees)

Center to origin Swap Y↔Z (Z-up)

Supported Formats

STL 3D printing

OBJ Wavefront

GLTF GL Transmission

GLB Binary GLTF

PLY 3D scanning

USDZ Apple AR

FBX Autodesk

DAE Import only

AMF Import only

3MF Import only

3D Preview

WebGL

Upload a 3D file to see preview

How to Convert 3D Files Online

Convert any 3D model in four simple steps — no software needed

STEP 1

Upload File

Drag & drop or click to load STL, OBJ, FBX, GLTF, GLB, PLY, DAE, AMF or 3MF

STEP 2

Preview Model

Inspect with interactive WebGL orbit controls. Check vertex count, face count and dimensions

STEP 3

Choose Format

Select your target format: STL, OBJ, GLTF, GLB, PLY, FBX or USDZ

STEP 4

Download

Converted file downloads instantly to your device — no email, no signup

Why Use Vextrude 3D Converter?

Built for designers, engineers, and developers who need fast, private format conversion

100% Private & Secure

Your 3D files never leave your device. All parsing and conversion runs entirely in your browser using WebAssembly and JavaScript — zero server uploads, zero data retention.

Instant In-Browser Conversion

Powered by Three.js and WebGL, conversions happen in milliseconds on your own hardware. No queues, no server lag — just instant results even for large meshes.

No Signup. Forever Free.

No account, no watermarks, no file size caps, no daily limits. Convert STL to OBJ, FBX to GLB, or any supported pair as many times as you need — completely free.

9 Formats Supported

Import STL, OBJ, GLTF, GLB, PLY, FBX, DAE, AMF and 3MF. Export to STL, OBJ, GLTF, GLB, PLY, FBX and USDZ — the widest format coverage of any free browser-based converter.

Works on Any Device

Runs in any modern browser on Windows, Mac, Linux, and mobile. No plugins, no installs, no admin rights — just open the page and convert.

Live 3D Preview

Inspect your model before converting with an interactive WebGL viewer. Orbit, zoom, wireframe toggle, and mesh stats help you verify your file is correct.

3D File Format Guide

Which format should you use? Here's a quick reference for every supported format

Format	Best For	Import	Export	Notes
STL	3D printing, CAD	✓	✓	Geometry only, no textures. Binary or ASCII.
OBJ	Cross-app exchange	✓	✓	Widely compatible. Supports materials via .mtl sidecar.
GLTF	Web & real-time 3D	✓	✓	JSON-based. The "JPEG of 3D" — ideal for web apps.
GLB	Web, AR, sharing	✓	✓	Binary GLTF, single-file. Embeds textures.
PLY	Point clouds, scanning	✓	✓	Supports vertex colors. Common in LiDAR/photogrammetry.
FBX	Game engines, animation	✓	✓	Standard for Unity/Unreal. Export is ASCII FBX 7.4.
USDZ	Apple AR / QuickLook	—	✓	Apple's AR format for iOS & macOS Quick Look.
DAE	Blender, SketchUp	✓	—	Collada XML format. Convert to GLB for web use.
AMF	Advanced 3D printing	✓	—	XML-based successor to STL. Convert to STL/OBJ.
3MF	Microsoft 3D printing	✓	—	Microsoft's modern print format. Convert to STL/OBJ.

Common Conversion Use Cases

Popular workflows that bring users to this tool

■ STL to OBJ — 3D Print to General Use

STL files from slicers like Cura or PrusaSlicer are great for printing but poor for rendering. Convert to OBJ to bring your model into Blender, Cinema 4D, or any DCC tool without losing geometry fidelity.

■ FBX to GLB — Game Asset to Web

FBX is the standard in Unity and Unreal Engine, but it's heavy for web. Convert to GLB for use in Three.js, Babylon.js, React Three Fiber, or any WebGL framework with a fraction of the file size.

■ OBJ / GLB to USDZ — Web to Apple AR

USDZ is required for iOS AR Quick Look and Apple Vision Pro experiences. Convert your existing OBJ or GLB models to USDZ to let users preview products in their space directly from Safari — no app download needed.

■ DAE / AMF / 3MF to STL — Legacy to Print-Ready

Older CAD exports in Collada (DAE), AMF, or 3MF sometimes aren't accepted by slicer software. Convert to binary STL for universal compatibility with Cura, PrusaSlicer, Bambu Studio, and all major 3D printing tools.

Frequently Asked Questions

Everything you need to know about the Vextrude 3D File Converter

What 3D file formats are supported for import and export?

Import: STL, OBJ, GLTF, GLB, PLY, FBX, DAE (Collada), AMF, and 3MF. Export: STL (binary), OBJ (Wavefront), GLTF (JSON), GLB (binary), PLY, FBX (ASCII 7.4), and USDZ (Apple AR). This makes it one of the most format-complete free 3D converters available online.

Are my 3D files uploaded to a server?

No — never. All loading, parsing, and export runs entirely inside your browser using JavaScript and WebGL. Your files never leave your computer. This makes the tool safe for confidential or proprietary 3D designs, IP-sensitive assets, and professional use.

What is the maximum file size I can convert?

There is no hard file size limit enforced by the tool. The practical limit depends on your browser's available memory. Files up to 100MB work well on most modern computers with 8GB+ RAM. Very large meshes (millions of polygons) may take a few seconds to load and display in the WebGL preview.

Will textures, colors and materials be preserved?

Geometry (vertices and faces) is always fully preserved. Vertex colors are retained when exporting to PLY and GLB. Textures embedded in GLB/GLTF inputs are passed through when exporting back to GLB/GLTF. Formats like STL and FBX (ASCII) carry geometry only. For full material fidelity, GLB → GLB is the lossless round-trip.

What is the difference between GLTF and GLB?

GLTF (GL Transmission Format) is a JSON text file that may reference external binary buffers and image files. GLB is the binary container version that packs all data — geometry, materials, and textures — into a single .glb file. For sharing or web deployment, GLB is almost always the better choice since it's a single self-contained file.

How do I convert STL to OBJ?

Drop your .stl file into the upload zone above, wait for the 3D preview to load, click the OBJ format card, then click "Convert & Download". The .obj file will save to your downloads folder instantly. The entire process takes under 5 seconds for most files.

Can I convert FBX to GLB for use in Three.js or Unity WebGL?

Yes. Drop your .fbx file, select GLB as the output format, and download. GLB is the recommended format for Three.js, Babylon.js, React Three Fiber, and Unity WebGL builds. It's smaller than FBX, loads faster over HTTP, and is natively supported by all WebGL engines.

What is USDZ and when should I export to it?

USDZ is Apple's Universal Scene Description zip format used for AR Quick Look on iPhone, iPad, and Apple Vision Pro. Export to USDZ when you want users to preview a 3D object in their real-world environment via Safari on iOS — no app required. It's ideal for e-commerce product visualization and AR marketing.