About 3D Convert
3D Convert is a free, in-browser 3D file converter built for designers, engineers, hobbyists, and anyone who works with 3D models. At 3dconvert.org, you can transform files between GLB, GLTF, OBJ, STL, 3MF, STEP, and FBX without installing software or creating an account. Every conversion runs locally inside your browser, so your models stay on your device from start to finish, never touching a remote server. That makes it a natural fit for quick edits on the go, shared workstations, and machines where you cannot install software.
Whether you are preparing a print, optimizing a model for the web, moving CAD geometry, or sharing an animated scene, 3D Convert gives you a practical path between the formats you use most. There is no upload and no remote conversion queue — just open the page and convert. STEP and FBX use isolated WebAssembly workers that load only when needed.
Why Choose a Browser-Based 3D Convert Tool?
Most online converters upload your files to a remote server, process them out of your sight, and only then hand the result back. This tool takes a different approach: everything happens on your own machine, inside your browser. That means true privacy, because your models are never transmitted anywhere, and true speed, because there is no upload or download step at all. You stay in control the entire time, and the result is ready the moment the conversion finishes.
A browser-based converter like this is also free and instant. There is no sign-up form, no trial limit, and no software to install. You can open 3dconvert.org on any modern device, drop in a file, and have a converted model seconds later. It works the same way on Windows, macOS, and Linux, making 3D Convert a dependable choice wherever you happen to be working.
Supported 3D Convert Formats
The converter supports seven useful 3D formats. GLB is the compact binary form of glTF, while GLTF keeps the scene description in readable JSON. OBJ is a broadly compatible static-mesh format, STL stores triangle geometry for printing, and 3MF is a richer manufacturing container.
STEP brings neutral CAD exchange and precise B-Rep input into the pipeline; browser conversion tessellates it, while STEP generated from a mesh remains faceted. FBX connects DCC, animation, and game workflows and can carry hierarchy, materials, rigs, and animation. The destination format determines which of those properties can survive.
How 3D Convert Works
Using 3D Convert is intentionally simple. The whole process takes place in your browser and usually finishes in seconds. You do not need to configure anything or adjust advanced settings — the converter handles the format translation for you. Here is how it works, step by step.
1. Choose a converter for your target format — for example, GLB to STL or OBJ to GLTF.
2. Drag and drop your file onto the page, or browse to select it from your device.
3. Click the convert button and let the tool process the model locally.
4. Preview the result in the built-in 3D viewer to confirm geometry and materials look correct.
5. Download the converted file to your device, ready for printing, publishing, or sharing.
Because every step runs on your own hardware, there is no waiting for a server and no risk of your file being stored anywhere. If something looks off in the preview, you can adjust your source file and run the conversion again as many times as you need. 3D Convert keeps the workflow short and transparent, so you can focus on your model rather than the tooling.
Private and Secure 3D Convert
Privacy is at the core of this tool. Your files never leave your device: they are read into your browser, converted in memory, and discarded when you close the page. Nothing is uploaded to a server, and nothing is stored after the conversion is done.
In practice, a normal file is around 50 MB, and the maximum supported size is 150 MB. Very large files may be slow to process or may fail depending on your device's available memory. For best results, close other heavy applications and use a recent browser. If a conversion does fail, reducing the file's complexity or trying again on a machine with more memory usually resolves it. With 3D Convert, your models stay yours, every time.
3D Convert for 3D Printing and the Web
Different projects call for different formats, and this converter is built to cover the main ones. For 3D printing, converting to STL or 3MF prepares your model for slicers and printers, with 3MF preserving color and material data that STL drops. For the web and AR experiences, GLB and GLTF are the natural targets — compact, self-contained, and ready for real-time rendering in browsers.
For editing and exchange, OBJ remains a simple, widely supported option that pairs cleanly with .mtl materials. Whether you are preparing a print, shipping a web scene, or moving a model between design tools, 3D Convert gives you a quick, private way to get the right format without installing anything. The result is a smoother pipeline from design to delivery, with no format getting in your way.