Convert 3D models between different formats online. Free and easy to use, supporting conversion between mainstream formats like GLB, GLTF, OBJ, STL and more. No software installation required -- complete conversions directly in your browser.
Support online preview of mainstream 3D file formats including GLB, GLTF, OBJ, STL, FBX and more. View 3D model details without downloading any software.
No need to install any 3D software or plugins. Convert 3D files directly in your browser with support for batch processing and instant downloads.
Support conversion of 3D models of various complexity, from simple geometry to complex scenes. Completely free to use with no file count restrictions.
Your 3D files are only processed locally in the browser, not uploaded to servers. Your model data is completely safe and private throughout the conversion process.
Support desktop, tablet and mobile devices. Responsive design ensures optimal conversion experience across different screen sizes. Convert your 3D models anywhere, anytime.
Converting your 3D model files is quick and simple. Follow these three easy steps to transform your STL files to OBJ format.
Simply drag and drop your STL file into the designated area or click to select files. Supports popular formats including GLB, GLTF, OBJ, STL with maximum file size of 50MB.
Select OBJ from the target format dropdown menu. Our tool automatically preserves geometry details, materials, and textures during conversion without requiring any technical knowledge.
Once conversion completes in seconds, click the download button to save your OBJ 3D model. Ready for 3D software editing or uploading to other platforms for texturing.
Learn about these popular 3D file formats and why you might need to convert between them.
STL (Stereolithography) is the standard format for 3D printing. Created by 3D Systems in the 1980s, it stores raw triangulated surface geometry without color or texture information. Its simplicity makes it universally compatible with all slicing software and 3D printers, from desktop FDM to industrial SLA machines.
OBJ (Wavefront Object) is one of the oldest and most universally supported 3D file formats. Developed by Wavefront Technologies in the 1980s, OBJ stores geometry data in a simple, human-readable text format. It supports vertices, normals, texture coordinates, and can reference external MTL files for material definitions. Nearly every 3D software application supports OBJ.
Convert STL to OBJ when you need material support via MTL files. OBJ adds texture coordinate and material capabilities that STL lacks, while maintaining broad compatibility.
File size differences between STL and OBJ depend on model complexity and the data each format stores. Our converter optimizes the output for the target format while preserving all supported features.
Frequently asked questions about converting STL to OBJ format and our 3D file conversion service.
We support conversion between GLB, GLTF, OBJ, STL, FBX, USDZ, BLEND, DAE, 3MF, and PLY formats. All conversions are bidirectional, so you can convert any supported format to any other supported format. Our advanced conversion engine maintains geometric precision, material properties, and texture quality across all format transformations.
Choose any format combination and start converting instantly
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