Wrap a printing-world .stl in a web-ready .glb that Blender, Unity, Unreal and every browser viewer read natively. Free, anonymous, and nothing leaves your device.
Three steps, one page, no account. The whole conversion is a local operation — the slowest part is you finding the file.
Drag the file onto the box above. It is read straight off your disk with the browser's File API — no upload, and no progress bar to a server.
The file is parsed, every mesh is baked into world space, and the result is written out in the target format. Your CPU does the work, so a client's unreleased model never leaves the room.
Save the converted file and open it wherever you were headed. Nothing is watermarked and nothing expires.
They solve different problems, which is exactly why one direction of this conversion costs you something and the other does not.
STL is the oldest and simplest format in 3D printing, and that is its virtue: a bare list of triangles with surface normals, nothing else. Every slicer ever written opens one without asking questions, which is why the printing world still runs on it.
GLB is the binary flavour of glTF — one file carrying geometry, UV coordinates, materials, textures and a scene graph together. It is what the web, Blender, Unity, Unreal and Three.js all read natively, and it is what this site's generator hands you.
Every conversion is a trade. Any tool that tells you otherwise is lying to you, so here is the exact ledger before you commit.
GLB is the format to keep. It holds geometry and texture in one file and every modern engine reads it, which is why the generator on this page outputs it. Convert onwards whenever a slicer or an older pipeline needs something else.
Go this direction when a file that was made for a slicer now has to be seen by people. GLB is the format the web understands, and it is a single file rather than a mesh with a separate everything.
Be clear about what you get: the STL had no colour to begin with, so the GLB arrives grey. That is the source file, not the converter — open it in the viewer and you will see the same geometry, just in a container that can hold a material later.
You do not have to go back to the home page. Type a prompt or drop an image, and take the .glb — free, anonymous, no watermark.
No. An STL stores triangles and surface normals only, so there is no colour anywhere in the source to carry across. The GLB is a container that can hold a material — you add one in Blender or your engine afterwards.
Because the web reads GLB and does not read STL. If a model needs to appear in a browser viewer, an AR preview or a game engine, GLB is the format that gets it there in one file with no plugin.
Same converter, same rules: free, in your browser, no signup.
3D AI Studio generates the .glb too — free, anonymous, no watermark.
No signup, no upload, no watermark — and the converter does not care how big the file is.
FreeNo signupNothing uploadedNo watermark
