AFrame: explore the Aframe examples on the AFrame Homepage to learn about the options your have, when you want to dig deeper into the AFrame framework.
Use the WebApp JSON3D4Frame, which creates a 3D model with geometric primitives.
WebApp JSON3D4Frame can be downloaded as ZIP and it runs offline in a browser.
↑ AR.js Studio - Beta-Version (2020) Open Source AR Modelling Tool for marker based and location based augemented reality - URL: https://ar-js-org.github.io/studio/ (accessed 2020/07/22)