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 STL 3D models to the web-ready GLB format seamlessly. This tool is essential for designers and engineers who need to move from static geometry to interactive 3D web displays.
STL files are the industry standard for 3D printing, focusing strictly on surface geometry through tessellation. In contrast, GLB is the 'JPEG of 3D,' a binary format that packs geometry, textures, and scene data into a single container optimized for modern web browsers and AR/VR applications. When you convert STL to GLB, our engine translates the triangulated surface mesh into a format that supports the full web rendering pipeline while maintaining the structural integrity of your original model.
The conversion is lossless, meaning every vertex and triangle from your STL file is preserved perfectly in the resulting GLB file.
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
