Website ScreenshotPNG
Captures any URL as a real screenshot. Defaults to WordPress mShots (no signup, no watermark) and auto-falls back to Microlink or thum.io if mShots is slow. First-time captures may take a few seconds — the tool polls until the real image arrives instead of showing the placeholder spinner.
Providers compared
WordPress mShots — used by Jetpack/WordPress.com to thumbnail external sites. Free, no key, no watermark. First request returns a tiny "spinner" placeholder while the headless browser captures — we poll for the real image automatically. Subsequent requests for the same URL/size hit cache and are instant.
Microlink — proper headless-Chrome render, full-page, well-maintained API. Free tier is 50/day per IP without signup.
thum.io — fast for above-the-fold captures, free tier adds a small watermark. Useful as a third fallback when mShots cache is cold and Microlink is rate-limited.