HTML to Image in Python
— without Selenium

import requests

def html_to_png(html: str) -> bytes:
    resp = requests.post(
        "https://api.renderpix.dev/v1/render",
        headers={
            "Authorization": f"Bearer {API_KEY}",
            "Content-Type":  "application/json",
        },
        json={
            "html":   html,
            "width":  1200,
            "height": 630,
            "format": "png",
        },
        timeout=30,
    )
    resp.raise_for_status()
    image_url = resp.json()["url"]
    return requests.get(image_url).content


# Usage
png_bytes = html_to_png("<h1 style='font-size:80px'>Hello</h1>")
with open("output.png", "wb") as f:
    f.write(png_bytes)

import httpx
import asyncio

async def html_to_png(html: str) -> bytes:
    async with httpx.AsyncClient(timeout=30) as client:
        resp = await client.post(
            "https://api.renderpix.dev/v1/render",
            headers={
                "Authorization": f"Bearer {API_KEY}",
                "Content-Type":  "application/json",
            },
            json={
                "html":   html,
                "width":  1200,
                "height": 630,
                "format": "png",
            },
        )
        resp.raise_for_status()
        image_url = resp.json()["url"]
        image = await client.get(image_url)
        return image.content


# Works with FastAPI, async Django, or standalone asyncio
png_bytes = asyncio.run(html_to_png("<h1>Hello</h1>"))

# views.py — Django OG image endpoint
import requests
from django.http import HttpResponse
from django.template.loader import render_to_string
from django.conf import settings


def og_image(request, post_slug):
    post = get_object_or_404(Post, slug=post_slug)

    # Render your Django template to an HTML string
    html = render_to_string("og_image.html", {"post": post})

    resp = requests.post(
        "https://api.renderpix.dev/v1/render",
        headers={"Authorization": f"Bearer {settings.RENDERPIX_API_KEY}"},
        json={"html": html, "width": 1200, "height": 630},
        timeout=15,
    )
    image_url = resp.json()["url"]
    png = requests.get(image_url).content

    return HttpResponse(
        png,
        content_type="image/png",
        headers={"Cache-Control": "public, max-age=86400"},
    )