Turn STL 3D models into GLB. It is converted in your browser, so the file never leaves your device.
Drop STL files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop STL files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the GLB, or download everything as one ZIP if you converted several files.
The STL to GLB converter is part of this page and runs inside your browser. Your 3D models are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
STL has no colour, no units and no texture, and it is large for detailed models. GLB is one self-contained file that web and AR viewers load directly. STL is at home in 3D printing; GLB is the usual choice for sharing one self-contained 3D model for the web or AR.
The model is converted as triangles: lines and points are dropped, positions are used as they are, and no axis conversion is applied, so a model that is Y-up in glTF and Z-up in STL, OBJ and PLY is written exactly as it was read. Everything, geometry and colours, goes into one binary file. Models up to 3,000,000 triangles are accepted.
STL describes a surface as a list of triangles and nothing else: no colour, no materials, no units. That simplicity made it the standard input of 3D printers and slicing software. It exists as binary and as text; the binary one is much smaller.
Opens in Every slicer and 3D printing program, CAD tools and Windows 3D Viewer
STL converterGLB packs a glTF scene, its geometry and its textures into one binary file, so it can be shared, uploaded or opened in an AR viewer without any companion files. Most 3D viewers on the web and social platforms prefer it.
Opens in Blender, web 3D viewers, game engines, Windows 3D Viewer and AR tools
GLB converter| STLSTL 3D model | GLBGLB 3D model | |
|---|---|---|
| Stands for | Stereolithography file | Binary glTF |
| Type | 3D model | 3D scene |
| Compression | None | None |
| Introduced | 1987, by 3D Systems | 2015, by the Khronos Group |
| Opens in | Every slicer and 3D printing program, CAD tools and Windows 3D Viewer | Blender, web 3D viewers, game engines, Windows 3D Viewer and AR tools |
| Best for | 3D printing | Sharing one self-contained 3D model for the web or AR |
| File extension | .stl | .glb |
No. The STL to GLB conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
No further quality is lost: GLB stores the decoded audio exactly. The result is identical in content.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the STL file, press Convert and save the GLB. There is nothing to install.
Yes. Models up to 150 MB and 3,000,000 triangles are accepted; a larger one is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.