Free · Browser-Based · Private

Free Online 3D Tools

Convert and inspect 3D models right in your browser. Nothing to install. Files never leave your device.

3D File Converter

Convert between OBJ, FBX, STL, GLB, USDZ, PLY and more. Client-side conversion — no server uploads required.

Try Converter

Online 3D Viewer

Inspect GLB, OBJ, STL, FBX and other 3D files in real time. Rotate, zoom, and explore with full WebGL rendering.

Open Viewer

STL Repair Tool

Fix duplicate vertices, degenerate faces, and bad normals. Detects holes and non-manifold edges for 3D print readiness.

Repair STL

Mesh Optimizer

Reduce polygon count by merging nearby vertices and removing degenerate faces. See before/after stats and export as GLB.

Optimize Mesh

Texture Resizer

Resize textures to power-of-two sizes for 3D engines. Convert between PNG, JPG, and WebP with quality control.

Resize Texture

3D Model Stats

Instantly check polygon count, vertex count, mesh objects, materials, textures, and bounding box for any 3D file.

Inspect Model

Normal Map Generator

Convert height maps to normal maps using the Sobel operator. Adjustable strength and side-by-side preview.

Generate Normal Map

3D Thumbnail Generator

Render a screenshot of any 3D model and export as PNG. Choose resolution, background, and camera angle.

Capture Thumbnail

3D Print Calculator

Estimate FDM print time, filament weight, and material cost. Configure layer height, infill, speed, and material.

Calculate

Popular Conversions

Jump straight to the most common 3D format conversions.

obj → glb fbx → glb stl → glb glb → usdz glb → stl gltf → glb

Supported Formats

.glb

Web-ready binary GLTF

.gltf

Khronos open standard

.obj

Universal geometry

.fbx

Autodesk animations

.stl

3D printing standard

.usdz

Apple AR Quick Look

.ply

Point cloud & research

.dae

Collada interchange

Why Use Our 3D Tools

Private by design

All processing runs in your browser. Your files never touch our servers.

Instant conversion

WebGL-accelerated conversion. Most files convert in under a second.

No install needed

Works in any modern browser on desktop or mobile. No plugins or software.

Frequently Asked Questions

Are these 3D tools free?

Yes. All tools are completely free with no hidden fees, account required, or usage limits.

Do my files get uploaded to a server?

No. All processing happens locally in your browser using WebAssembly and WebGL. Your files never leave your device.

Which 3D file formats are supported?

The tools support GLB, GLTF, OBJ, FBX, STL, PLY, and DAE (Collada) formats. Texture tools support PNG, JPG, and WebP. The STL repair and 3D print calculator have specific format requirements noted on their pages.

Can I repair a broken STL file for 3D printing?

Yes. The STL Repair tool detects and fixes duplicate vertices, degenerate faces, and bad normals. It also flags non-manifold edges and open holes so you know what needs manual attention.

How do I reduce the polygon count of a 3D model?

Use the Mesh Optimizer tool. Upload your GLB, OBJ, STL, or PLY file, adjust the vertex merge threshold slider, and download an optimized GLB with before/after statistics shown.

Can I use these tools on mobile?

Yes. The tools work on modern mobile browsers that support WebGL, including Chrome and Safari on iOS and Android.