obj2html lib

You can use that lib to create html file from a .obj path:

from obj2html import obj2html
obj2html('model.obj', 'index.html')
# firefox index.html

Use in a Jupyter notebook to display a .obj 3D file:

! pip install obj2html
! wget https://gitlab.com/nicolalandro/obj2html/-/raw/main/test/assets/model.obj
from obj2html import obj2html
from IPython.display import display, HTML
obj2html('model.obj', 'index.html')
display(HTML('index.html'))

Use in streamlit app to display a .obj 3D file and create download button:

import streamlit as st
import streamlit.components.v1 as components
from obj2html import obj2html

html_string = obj2html("model.obj", html_elements_only=True)
components.html(html_string)
with open("model.obj") as f:
  st.download_button('Download model.obj', f, file_name="download_name.obj")

It is also possible to set the scale factor, light and camera options:

camera={
  "fov": 45,
  "aspect": 2,
  "near": 0.1,
  "far": 100,
  "pos_x": 0,
  "pos_y": 10,
  "pos_z": 20,
  "orbit_x": 0,
  "orbit_y": 5,
  "orbit_z": 0,
},
light={
  "color": "0xFFFFFF",
  "intensity": 1,
  "pos_x": 0,
  "pos_y": 10,
  "pos_z": 0,
  "target_x": -5,
  "target_y": 0,
  "target_z": 0,
},
obj_options={
  "scale_x": 30,
  "scale_y": 30,
  "scale_z": 30,
}
obj2html('model.obj', 'index.html', camera, light, obj_options)