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The most reliable way to convert a live webpage to an image in Python is to render it in a real browser with Playwright, then call page.screenshot(). Use full_page=True for the complete scrollable document, a locator screenshot for one element, or omit the file path to keep PNG/JPEG/WebP bytes in memory. For static HTML where browser JavaScript is unnecessary, WeasyPrint can be a useful alternative, provided its HTML/CSS support and security requirements fit your input.
Choose the renderer before writing code
Your choice depends on what “HTML” means in your project:
| Requirement | Best fit | Reason |
|---|---|---|
| Live website, responsive layout, fonts, JavaScript, clicks or lazy loading | Playwright | It drives Chromium, Firefox or WebKit and captures the browser’s rendered page. |
| Entire scrollable page | Playwright with full_page=True |
The screenshot extends beyond the current viewport. |
| One card, chart or other region | Playwright locator screenshot | The selector defines the capture boundary. |
| HTML string or document with mostly static CSS | Playwright set_content() or WeasyPrint |
Both accept supplied markup; WeasyPrint also exposes a base_url for relative assets. |
Playwright requires both the Python package and browser binaries. WeasyPrint is not established as a drop-in replacement for JavaScript-heavy browser pages, so test the exact document instead of assuming identical output. Its documentation also warns that untrusted HTML or CSS can create security risks.
Install Playwright and its browsers
- Create or activate a virtual environment.
- Install the package:
pip install playwright. - Download browser binaries:
playwright install.
The package provides synchronous and asynchronous APIs. The examples below use the synchronous API because it is easiest to place in a script; the same operations are available asynchronously.
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Capture a webpage as a PNG
This complete script opens a URL, waits for the page navigation to finish, and writes a full-page PNG:
from playwright.sync_api import sync_playwright
url = "https://example.com"
with sync_playwright() as p:
browser = p.chromium.launch()
page = browser.new_page(viewport={"width": 1440, "height": 900})
page.goto(url, wait_until="networkidle")
page.screenshot(path="page.png", full_page=True)
browser.close()Use a normal load or domcontentloaded wait when a site keeps analytics connections open and never reaches network idle. For pages that render content after navigation, wait for a stable selector or an explicit delay before capturing.
Capture only the viewport
page.screenshot(path="viewport.png")Without full_page=True, the image is limited to the current viewport. Set the viewport when exact pixel dimensions matter.
Capture one element
card = page.locator("article.product-card").first
card.screenshot(path="card.png")A locator screenshot is preferable to manually calculating clip coordinates because the element’s current rendered box determines the image.
Keep screenshot bytes in memory
image_bytes = page.screenshot(type="png")
with open("page.png", "wb") as output:
output.write(image_bytes)This is useful when you need to upload the result, hash it, or transform it without creating an intermediate file.
Choose PNG, JPEG or WebP
The Page API supports PNG, JPEG and WebP. PNG has no quality setting; JPEG and WebP accept a quality value. Use PNG for sharp text, transparency and lossless diagrams. Use JPEG for photographic pages when a smaller file matters. Use WebP when your downstream system accepts it and you want a modern compressed format.
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page.screenshot(path="photo.jpg", type="jpeg", quality=85)
page.screenshot(path="page.webp", type="webp", quality=85)Device scale also affects output size and sharpness. A retina-style capture can be requested when creating the page:
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viewport={"width": 1280, "height": 800},
device_scale_factor=2
)Render supplied HTML instead of a URL
set_content() loads an HTML string into a browser page. Wait for the relevant element, font or image before taking the shot:
from playwright.sync_api import sync_playwright
html = """
Invoice
Ready to capture.
"""
with sync_playwright() as p:
browser = p.chromium.launch()
page = browser.new_page(viewport={"width": 1000, "height": 700})
page.set_content(html, wait_until="load")
page.locator(".panel").wait_for(state="visible")
page.screenshot(path="invoice.png", full_page=True)
browser.close()For relative images, stylesheets or fonts in supplied markup, provide usable URLs and confirm that the browser can reach them. A data URL or embedded CSS avoids dependence on a working local path.
Use WeasyPrint for static documents
WeasyPrint exposes a Python HTML API that accepts sources such as filenames, URLs and file objects. Its base_url tells the renderer how to resolve relative resources:
from weasyprint import HTML
HTML(
string="""
<html><body><h1>Report</h1><img src="images/logo.png"></body></html>
""",
base_url="/path/to/project"
).write_png("report.png")Choose this route when the document’s supported HTML and CSS are sufficient and you do not need browser interaction. Do not assume JavaScript widgets, client-side data fetching or browser-only layout behavior will be reproduced. Treat user-supplied HTML and CSS as untrusted: isolate the rendering process, restrict accessible files and network resources, and validate content before rendering.
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Wait for the content you need
Prefer a meaningful readiness condition over an arbitrary long sleep:
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page.goto(url, wait_until="domcontentloaded")
page.locator("main.dashboard").wait_for(state="visible")
page.screenshot(path="dashboard.png", full_page=True)If no selector represents readiness, a short page.wait_for_timeout(milliseconds) can handle a known animation, but it is less reliable than waiting for the actual result.
Control layout inputs
- Set viewport width and height explicitly.
- Set
device_scale_factorwhen pixel density is part of the specification. - Select the browser engine that matches your compatibility target.
- Freeze or disable animations with injected CSS when screenshots must be comparable.
Handle authentication and private pages
Use Playwright’s browser context facilities for cookies or an authenticated storage state, and never hard-code credentials in source control. If the page requires a login, capture only after an explicit post-login selector is visible.
Common failures and fixes
“Executable doesn’t exist” or browser launch errors
Install the browser binaries with playwright install. In containers, ensure the image includes the required browser dependencies and that the process has permission to launch the browser.
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The image is blank or missing late content
The screenshot probably ran before client-side rendering completed. Wait for a content selector, an image, or the application’s ready state. Check the URL and inspect console or network errors.
Relative images or CSS do not appear
For browser pages, verify the resource URL is reachable from the capture environment. For WeasyPrint, set base_url to the directory or URL that makes relative references resolvable.
The output is cropped
Use full_page=True for a complete scrollable page, or capture a locator whose box includes the intended content. For a fixed design, increase the viewport dimensions.
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Network idle never arrives
Analytics, WebSockets and polling can keep connections open. Replace wait_until="networkidle" with domcontentloaded plus a selector wait.
Fonts or images differ between machines
Install the same fonts and browser version in each environment, or bundle assets. Keep viewport, scale factor, locale and timezone consistent.
WeasyPrint output differs from the browser
That is expected when the page depends on JavaScript or browser-specific behavior. Use Playwright for interactive pages, or simplify the document to the HTML/CSS features your WeasyPrint version supports.
Performance, reliability and cost considerations
Launching a browser for every image adds startup work. For batches, keep one browser process alive and create isolated contexts or pages per job, then close them deterministically. Limit concurrency to the memory available on the host. Reuse a page only when you can reliably clear cookies, storage and application state.
Set navigation and operation timeouts, record failures with the target URL and readiness condition, and retry transient network errors rather than deterministic selector failures. Store the exact viewport, browser engine, output type and application revision alongside each image so later differences are explainable. Screenshot dimensions and format directly affect file size; choose them from the consumer’s requirements instead of always requesting a full retina PNG.
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ScreenshotNeo provides a website screenshot API when you want one HTTP request instead of packaging a browser. It accepts a URL and returns PNG, JPEG, WebP or PDF. Before capture it accepts cookie/consent banners and removes more than 60 known consent platforms, newsletter popups and chat widgets; each cleanup step can be disabled. Bot checks or CAPTCHAs, blank pages, timeouts, failed loads and cache hits are not billed, and response headers identify the page verdict and billing status. It also offers an MCP server for Claude, Cursor and other MCP clients, with take_screenshot, get_page_info and capture_pdf tools.
See the ScreenshotNeo API documentation for all options, including full-page and element capture, device presets, custom CSS and JavaScript, waits, request blocking, headers, cookies, user agents, authentication, timezone, geolocation, transparent backgrounds, resizing, cache TTLs, signed links, asynchronous webhooks, bulk capture and usage reporting.
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cURL
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpPython
import requests
r = requests.get("https://api.screenshotneo.com/v1/shot", params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"}, timeout=90)
r.raise_for_status()
open("shot.webp", "wb").write(r.content)Node.js
const q = new URLSearchParams({ access_key: 'YOUR_API_KEY', url: 'https://stripe.com' });
const res = await fetch(`https://api.screenshotneo.com/v1/shot?${q}`);
if (!res.ok) throw new Error(`HTTP ${res.status}`);
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FAQ
Can Playwright return an image without writing a file?
Yes. Omit path and the screenshot method returns bytes that you can upload or process in memory.
Which format supports a quality parameter?
JPEG and WebP support quality controls; PNG does not.
Should I use synchronous or asynchronous Playwright?
Either API supports the same browser screenshot capabilities. Synchronous code is simpler for scripts; asynchronous code fits an existing async service.
Is WeasyPrint safe for arbitrary user HTML?
Its documentation warns that untrusted HTML or CSS can introduce security problems. Isolate and constrain untrusted rendering rather than treating it as safe by default.
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