Binary glTF - a whole scene in one file, with geometry, materials and textures packed together. It's what web viewers, AR on phones and modern engines load, and it's designed to go from download to on-screen with almost no processing in between.

Every conversion below runs in this page, on your own machine. Nothing is uploaded, there is no queue, and there is no account to make. Pick a target format, or just drop a GLB file above and choose afterwards.