HTML to PDF in Python

Send HTML (or a URL) to the FrameForge API and get a PDF back. It is rendered in real Chromium, so modern CSS, web fonts and JavaScript all work. No browser to install or babysit.

The code

Python 3 with requests. Set FRAMEFORGE_KEY to your API key.

import os
import requests

resp = requests.post(
    "https://api.frameforgeapi.com/render",
    headers={"X-API-Key": os.environ["FRAMEFORGE_KEY"]},
    json={
        "html": "<h1>Invoice #1001</h1><p>Total: £49.00</p>",
        "format": "pdf",
        "width": 794,   # A4 at 96 DPI
        "height": 1123,
    },
    timeout=60,
)
resp.raise_for_status()
with open("invoice.pdf", "wb") as f:
    f.write(resp.content)

How it works

• POST /render takes JSON with exactly one of html (up to 1 MiB) or url, plus format (png, jpeg or pdf), width and height (1 to 3840 px) and fullPage.
• The response body is the file itself (application/pdf), not JSON, so write the bytes straight to disk or stream them to the user.
• Page size: the PDF page is width × height pixels. 794 × 1123 is A4 at 96 DPI and 816 × 1056 is US Letter. Content longer than one page flows onto more pages of the same size. With fullPage: true you get one tall page instead.
• Margins: pages have no printer margins, so add padding in your HTML (for example body { padding: 48px }).
• Caching: identical requests within 24 hours are served from cache and don't count against your quota. Check the X-FrameForge-Cache response header.
• Errors come back as JSON with an error code: 401 bad key, 429 rate limited, 400 blocked_url for private or local addresses.

Rendering a URL instead of HTML

{"url": "https://example.com/report", "format": "pdf", "width": 1280, "height": 800, "fullPage": true}

Doing it yourself instead

Playwright for Python gives you the same Chromium engine locally. WeasyPrint is a solid pure-Python option for print-style documents, but it does not run JavaScript.

An API makes sense when you don't want Chromium on your servers, or when you need images (PNG/JPEG) and PDFs from the same call. If you render a few PDFs a month on a server you already run, self-hosting is perfectly reasonable.

Free tool: Website to PDF. Other languages: Node.js · PHP · Ruby · Go · Java · C# / .NET · curl / Bash · Next.js · Laravel · Django · Ruby on Rails