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3D Model Workbench

Convert, optimize, and compress 3D model files across major formats (GLB, glTF, OBJ, STL, PLY, FBX, USDZ) with Draco/meshopt compression and polygon reduction.

Select or drop a 3D model

Optimize, compress and convert GLB, glTF, OBJ, STL, PLY, FBX and USDZ models in your browser: clean up, reduce triangles, resize and re-encode textures, scale and export.

In-browser processing — files never leave your device.
Supports all major 3D formats: GLB, FBX, OBJ, STL, USDZ.
Polygon reduction with meshoptimizer guarantee.
Draco & meshopt geometry compression for glTF/GLB.

Why ToolBuddy?

No file upload

Your files never leave your device.

Fast browser processing

Processing runs directly in your browser.

All major 3D formats

Supports GLB, glTF, OBJ, STL, PLY, FBX, and USDZ.

Free, no signup

All tools are free forever. No account required.

Know your workflow

Supported files and how to use.

Check supported input/output details and follow the tool steps before exporting.

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Technical specs and decision signals

Use these specs to validate workflow fit, privacy boundaries, and output expectations before you run 3d-model-workbench.

Cost

Free workflow with no signup gate for core usage.

Security

All processing runs in-browser — files never leave your device.

Device

Supports modern desktop and mobile browsers with OffscreenCanvas support.

Tech specs

Input: GLB, glTF, OBJ, STL, PLY (binary and ASCII variants). Output: Same formats plus Draco/meshopt-compressed GLB. Operations: Convert, Optimize (polygon reduction), Compress (Draco/meshopt). Undo: 5-step history.

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How to use

Check supported input/output details and follow the tool steps before exporting.

01

Drop or select a 3D model, a glTF folder or a ZIP, or try the sample model.

02

Choose a preset (Web delivery, Game engine or Smallest file) or set the steps yourself in the Control Panel.

03

Pick the export format, then click Optimize model.

04

Check what each step saved, use Undo if you want to try other settings, and click Download.

05

Optionally add more models under More files to process them all with the same settings.

Guide

Learn, decide, and apply.

Understand how to how to convert and compress 3d models in your browser, why it matters in repeat workflows, and when to use this tool with confidence.

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In-browser 3d model tools

  • Runs entirely in your browser — files never leave your device.
  • Supports all major 3D formats: GLB, glTF, OBJ, STL, PLY, FBX, and USDZ.
  • Polygon optimization via meshoptimizer with a never-increase-triangle guarantee.
  • Draco and meshopt geometry compression for glTF/GLB.
  • 5-step undo stack for safe iterative editing.
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Convert and optimize 3d files without software

  • Convert OBJ or STL files to GLB for web delivery.
  • Reduce polygon count before exporting to a game engine.
  • Apply Draco compression to shrink GLB files for faster loading.
  • Inspect model statistics before sharing or submitting a file.
  • Batch-convert 3D assets without installing software.
About

About 3D Model Workbench

How to convert and compress 3d models in your browserIn-browser 3d model toolsConvert and optimize 3d files without software

Convert between 3D formats

The workbench supports all major 3D formats including GLB, glTF, OBJ, STL, PLY, FBX, and USDZ. Conversion is one-click — pick a target format and download.

Format-specific warnings (dropped animations, missing materials) surface before you export so nothing is lost silently.

Reduce polygon count

The Optimize card uses meshoptimizer to simplify meshes. Set the target reduction ratio and the workbench enforces a never-increase-triangle guarantee.

Before/after triangle counts are shown so you can judge the trade-off before downloading.

Apply geometry compression

Draco and meshopt compression reduce GLB file size significantly for web delivery. Compression is only available for glTF and GLB exports.

The workbench disables the compression card and shows an inline note when a non-glTF format is selected, preventing invalid exports.

FAQ

Common questions.

Have more questions? Reach out via our contact page and we will respond within 24 hours.

Do my 3D files upload to a server?

No. 3D Model Workbench runs entirely in your browser and never sends your files to a server.

Which 3D formats are supported?

It opens GLB, glTF (with its .bin and textures, a folder or a ZIP), OBJ, STL, PLY, FBX, USDZ and the other formats the 3D Model Viewer reads, and exports GLB, glTF, OBJ, STL, PLY and USDZ.

What does Optimize model do?

It runs the steps you choose in one go: clean up (weld vertices, remove duplicate and unused data), reduce triangles, resize and re-encode textures, scale and re-position, then compress the geometry. The result shows what each step saved.

Should I use WebP or KTX2 textures?

WebP makes the smallest files and suits the web. KTX2 stays compressed on the graphics card, so a model uses far less memory in a game engine or a large scene, though the file can be larger.

What is Draco or Meshopt compression?

Both shrink the geometry inside GLB and glTF files. Draco usually makes the smallest files; Meshopt decodes faster. Other formats cannot store compressed geometry, so the option only applies to GLB and glTF.

Can I process several models at once?

Yes. Add them under More files and the same settings are applied to each, downloaded together as a ZIP. A file that cannot be processed is listed with the reason.

Can I undo operations?

Yes. Undo and Redo step back and forward through the last five runs, and you can download the model at any step.

Use cases

Popular workflows.

See real workflows where this tool fits naturally, then jump straight into the matching guide.

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Guides

Learn with practical workflow guides.

Read intent-focused guides, then jump straight into the live tool workflow.

View all guides

3D Model Workbench use cases

Practical workflows and common jobs you can handle with 3D Model Workbench.

Open guide

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