Chrome network error · -212 · Certificate

ERR_CERT_NAME_CONSTRAINT_VIOLATION

The certificate claimed DNS names that are in violation of name constraints.

Chromium's description

The certificate claimed DNS names that are in violation of name constraints.

Chrome shows it as net::ERR_CERT_NAME_CONSTRAINT_VIOLATION, error -212. puppeteer and Playwright report the same name when a page fails to load in Chromium.

ERR_CERT_NAME_CONSTRAINT_VIOLATION in the screenshot API

Certificate errors do not stop a render: the API's browser accepts the certificate and captures the page the server sends, so a screenshot of a site with this error works. It does not tell you whether the certificate is valid; use an SSL checker for that.

Only the page's own load can fail a render. An image, script or frame of the page that fails with a network error does not: the page is captured as the browser shows it without that resource.

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Rendered in a real browser with cookie banners hidden. Takes 5–30 seconds.

Other common errors

ERR_CONNECTION_RESET ERR_CONNECTION_REFUSED ERR_CONNECTION_TIMED_OUT ERR_CACHE_MISS ERR_ADDRESS_UNREACHABLE ERR_TIMED_OUT ERR_SSL_PROTOCOL_ERROR ERR_CONNECTION_CLOSED ERR_QUIC_PROTOCOL_ERROR ERR_NAME_NOT_RESOLVED ERR_TOO_MANY_REDIRECTS ERR_NETWORK_CHANGED

All 249 Chrome network errors · Screenshot API errors

Screenshot API

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GET https://api.screenshotbase.com/v1/take?url=https://example.com&full_page=true

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  --data-urlencode "url=https://example.com" \
  -d viewport_width=1280 -d viewport_height=800 \
  -d format=png \
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  -o screenshot.png

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Website screenshot Capture any page as an image. Full page screenshot Capture a whole page, top to bottom. Mobile website screenshot See a site on iPhone, Android and iPad. URL to PDF Save any web page as a PDF. URL to markdown Turn a web page into markdown. HTML to PDF Print your own HTML as a PDF. HTML to image Render HTML and CSS as a PNG, JPG or WebP. HTML to markdown Turn HTML into clean markdown. URL to PNG Save a web page as a PNG image. URL to JPG Save a web page as a JPG image. Scrolling screenshot One long image of a page, no stitching. HTML to PNG Render HTML as a lossless PNG. HTML to JPG Render HTML as a compact JPG. Viewport sizesScreen sizes and pixel ratios of 46 devices. ErrorsChrome network errors and screenshot API errors, with fixes.