Take a Full‑Page Screenshot of a JavaScript‑Heavy Website

Single‑page apps (SPAs) render most of their content in the browser. Traditional HTTP-only scrapers miss what JavaScript adds after page load. Supacrawler solves this by driving a real browser for you — no Playwright/Puppeteer setup, no headless Chrome to manage.

Note: If you’re using the SDKs (recommended), install them first or see our Install guide: Install the SDKs.

Goal

Take a full‑page screenshot of a JavaScript‑heavy page, after it finishes rendering, with optional waits and device settings.

curl -X POST https://api.supacrawler.com/api/v1/screenshots \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://spa-example.com",
    "device": "desktop",
    "full_page": true,
    "format": "png",
    "wait_until": "networkidle",
    "wait_for_selector": "#content",
    "block_ads": true
  }'

Note: When the API returns an image URL (instead of inline base64), it is a signed URL that expires after 15 minutes. If you need long-term access, download the image and store it in your own storage.

Tips for reliable screenshots

• Render timing: Use wait_until='networkidle' or wait (milliseconds) for heavy apps. Combine with wait_for_selector when a specific widget signals readiness.
• Devices & viewport: Set device='desktop' and adjust width/height or device_scale for crisp output. Use is_mobile/has_touch for mobile variants.
• Quality & format: Prefer png for UI docs, jpeg for photography, webp for smaller files; control with quality (for lossy formats).
• Remove distractions: block_ads, block_cookies, block_chats, and hide_selectors help produce clean images.
• Actions before capture: click_selector, scroll_delay, and delay let you open menus, lazy‑load content, or stabilize animations before the capture.

With Supacrawler, you get production‑grade screenshots without owning browser infrastructure. Point it at any page, tell it how to wait, and get a high‑quality image back.