HTML to PDF in Python — without WeasyPrint or a headless browser

import requests

API_KEY = "sk_live_YOUR_KEY"

def render_pdf(html: str) -> bytes:
    resp = requests.post(
        "https://api.html2dochub.com/v1/render",
        headers={"X-API-Key": API_KEY},
        json={
            "type": "pdf",
            "html": html,
            "options": {"format": "A4", "margin": "18mm"},
        },
        timeout=60,
    )
    resp.raise_for_status()
    job = resp.json()
    return requests.get(job["download_url"], timeout=60).content

pdf_bytes = render_pdf("<h1>Invoice #INV-0042</h1><p>Total: ₹1,200</p>")
open("invoice.pdf", "wb").write(pdf_bytes)

import httpx

async def render_pdf(html: str) -> bytes:
    async with httpx.AsyncClient(timeout=60) as client:
        resp = await client.post(
            "https://api.html2dochub.com/v1/render",
            headers={"X-API-Key": API_KEY},
            json={
                "type": "pdf",
                "html": html,
                "options": {"format": "A4"},
            },
        )
        resp.raise_for_status()
        job = resp.json()

        pdf_resp = await client.get(job["download_url"])
        return pdf_resp.content

from django.http import FileResponse
from django.template.loader import render_to_string
import requests, io

def invoice_pdf(request, invoice_id: int):
    html = render_to_string("invoices/detail.html", {"invoice": Invoice.objects.get(pk=invoice_id)})

    resp = requests.post(
        "https://api.html2dochub.com/v1/render",
        headers={"X-API-Key": settings.HTML2DOCHUB_API_KEY},
        json={"type": "pdf", "html": html, "options": {"format": "A4"}},
        timeout=60,
    )
    resp.raise_for_status()
    pdf = requests.get(resp.json()["download_url"], timeout=60).content

    return FileResponse(io.BytesIO(pdf), filename=f"invoice-{invoice_id}.pdf",
                        content_type="application/pdf")

from celery import shared_task
import requests, uuid

@shared_task(bind=True, max_retries=3, default_retry_backoff=True)
def generate_report_pdf(self, report_id: int):
    report = Report.objects.get(pk=report_id)
    idempotency_key = f"report-{report_id}-v{report.version}"

    try:
        resp = requests.post(
            "https://api.html2dochub.com/v1/render",
            headers={"X-API-Key": settings.HTML2DOCHUB_API_KEY},
            json={
                "type": "pdf",
                "mode": "async",
                "html": report.render_html(),
                "webhook_url": f"{settings.BASE_URL}/webhooks/pdf-ready",
                "tag": f"report:{report_id}",
                "idempotency_key": idempotency_key,
            },
            timeout=30,
        )
        resp.raise_for_status()
    except requests.RequestException as exc:
        raise self.retry(exc=exc)

    report.job_id = resp.json()["id"]
    report.save()