STL Tools

STL to 3MF Converter - Convert STL Files to 3D Manufacturing Format

Convert your STL files to modern 3MF format with metadata support. Free online tool that transforms legacy STL files into the advanced 3D Manufacturing Format for modern workflows.

Upload STL Files

Select STL files to convert to 3MF format

Loading usage information...

Converted Files

Download your converted 3MF files

No files converted yet

Upload STL files to see results here

STL to 3MF Converter Features

Transform legacy STL files into modern 3D Manufacturing Format

Legacy STL Support

Full compatibility with both ASCII and binary STL files from any source or software.

Modern 3MF Output

Convert to the advanced 3MF format with metadata support and modern workflow compatibility.

Instant Processing

Fast conversion using optimized algorithms for quick STL to 3MF file transformation.

Why Convert STL to 3MF?

Upgrade your 3D files to the modern 3MF standard for enhanced capabilities

Rich Metadata

3MF format supports colors, materials, textures, and print settings that STL cannot store.

Better Compression

3MF files are typically smaller than equivalent STL files due to built-in compression.

Future-Proof

3MF is the modern standard supported by Windows 10/11, Microsoft 3D Builder, and modern slicers.

About STL to 3MF Conversion

Converting STL (STereoLithography) files to 3MF (3D Manufacturing Format) brings legacy 3D models into the modern era of 3D printing and manufacturing. While STL has been the standard for decades, 3MF offers significant advantages including metadata support, compression, and future-proofing.

When to Convert STL to 3MF:

  • Modern Workflows: Use with Windows 10/11, Microsoft 3D Builder, and modern software
  • File Size Reduction: Benefit from 3MF's built-in compression capabilities
  • Metadata Addition: Add colors, materials, and print settings to your models
  • Future-Proofing: Prepare files for next-generation 3D printing workflows

STL vs 3MF Comparison:

  • STL: Simple geometry-only format, universal compatibility, larger file sizes
  • 3MF: Rich metadata support, compression, modern standard, smaller files
  • Support: STL universal vs 3MF growing adoption in modern software
  • Features: STL basic geometry vs 3MF colors, materials, and settings

Technical Benefits:

  • Compression: 3MF files are typically 50-90% smaller than equivalent STL files
  • Metadata Support: Store colors, materials, textures, and print settings
  • Modern Standard: Industry-standard format developed by Microsoft and 3MF Consortium
  • XML-Based: Human-readable structure for debugging and modification

Use Cases:

  • Windows Integration: Better integration with Windows 10/11 3D features
  • Modern Slicers: Take advantage of advanced slicer features and settings
  • File Sharing: Smaller file sizes for easier sharing and storage
  • Professional Workflows: Use with CAD software that supports modern 3MF features