Any file up to 500 MB. Drop several files and they come back as one ZIP. Many image, audio and video conversions run in your browser; anything else is uploaded and removed within the hour.
Convert your GLTF 3D models to STL format quickly and efficiently. This tool is essential for designers and engineers preparing web-based graphics for 3D printing workflows.
GLTF (GL Transmission Format) is optimized for web delivery and real-time rendering, often containing complex scene hierarchies and PBR materials. In contrast, STL (STereoLithography) is the industry standard for 3D printing, representing surface geometry using a simple mesh of triangles. When converting from GLTF to STL, the process strips away textures, animations, and lighting data, focusing strictly on the geometric surface mesh required by slicing software.
The conversion preserves geometric fidelity perfectly. As both formats represent the object's surface as a mesh, there is no loss of structural detail during the process.
We built this project so anyone can convert files without paywalls, accounts, or hidden limits. Here is what that promise means in practice.
Every converter on ConvertX is free to use: no trials, no premium tiers, and no credit packs. We will never put core conversion features behind a subscription. Whether you convert one photo or a hundred files a week, the price stays zero.
Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.
A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.
Meshes and scenes for 3D printing, games, and CAD.
Common extensions: OBJ, STL, GLTF, GLB, FBX, PLY
Raster and vector graphics for web, print, and photography.
Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF
Office files, PDFs, ebooks, and plain text.
Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT
Clips, streams, screen recordings, and movies.
Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG
