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HomeSTL vs USDZ
.stl
.usdz

STL vs USDZ

Compare Stereolithography and Universal Scene Description formats — understand the key differences and when to use each

Format Overview

STL

Stereolithography

Stereolithography (.stl) is a 3d file format.

.stl3d

USDZ

Universal Scene Description

Universal Scene Description (.usdz) is a 3d file format.

.usdz3d

STL vs USDZ: Feature Comparison

FeatureSTLUSDZ
Full NameStereolithographyUniversal Scene Description
File Extension.stl.usdz
Category3d3d
Free to Convert✓ Yes✓ Yes
Browser Support✓ All Browsers✓ All Browsers
Convert to Each Other✓ Yes✓ Yes

When to Use STL vs USDZ

Use STL when you need:

  • •Files in Stereolithography format for maximum compatibility
  • •Industry-standard 3d format support
  • •Wide software and platform compatibility

Use USDZ when you need:

  • •Files in Universal Scene Description format for specific workflows
  • •Optimized 3d format features
  • •Modern format advantages and smaller file sizes

Convert Between Them

STL USDZUSDZ STL
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最大ファイルサイズ：2GB

ファイルはブラウザ内でローカルに処理されます。サーバーにアップロードされません。

Learn More About These Formats

STL Converter USDZ Converter

Frequently Asked Questions

What is the difference between STL and USDZ?
STL (Stereolithography) and USDZ (Universal Scene Description) are both 3d file formats. STL files use the .stl extension while USDZ uses .usdz. They differ in compression, quality, compatibility, and intended use cases.
Can I convert STL to USDZ for free?
Yes! Convert999 lets you convert STL to USDZ completely free, directly in your browser. No file upload to any server, no registration needed — your files stay private on your device.
Which is better, STL or USDZ?
It depends on your use case. STL (Stereolithography) may be better for certain workflows, while USDZ (Universal Scene Description) excels in others. Consider factors like file size, quality, software compatibility, and your specific needs.
Is it safe to convert files on Convert999?
Absolutely. Convert999 processes all files 100% locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

STL Converter

Convert from STL

USDZ Converter

Convert from USDZ

File Tools

Compress, resize, merge

Convert to STL

All sources → STL

Convert to USDZ

All sources → USDZ

Format Statistics

Trends & data 2025

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