Chrome network error · -186 · Connection

ERR_PROXY_UNABLE_TO_CONNECT_TO_DESTINATION

An attempt to proxy a request failed because the proxy wasn't able to successfully connect to the destination. This likely indicates an issue with the request itself (for instance, the hostname failed to resolve to an IP address or the destination server refused the connection). This error code is used to indicate that the error is outside the control of the proxy server and thus the proxy chain should not be marked as bad. This is in contrast to ERR_TUNNEL_CONNECTION_FAILED which is used for general purpose errors connecting to the proxy and by the proxy request response handling when a proxy delegate doesn't indicate via a different error code whether proxy fallback should occur. Note that for IP Protection proxies this error code causes the proxy to be marked as bad since the preference is to fail open for general purpose errors, but for other proxies this error does not cause the proxy to be marked as bad.

Chromium's description

An attempt to proxy a request failed because the proxy wasn't able to successfully connect to the destination. This likely indicates an issue with the request itself (for instance, the hostname failed to resolve to an IP address or the destination server refused the connection). This error code is used to indicate that the error is outside the control of the proxy server and thus the proxy chain should not be marked as bad. This is in contrast to ERR_TUNNEL_CONNECTION_FAILED which is used for general purpose errors connecting to the proxy and by the proxy request response handling when a proxy delegate doesn't indicate via a different error code whether proxy fallback should occur. Note that for IP Protection proxies this error code causes the proxy to be marked as bad since the preference is to fail open for general purpose errors, but for other proxies this error does not cause the proxy to be marked as bad.

Chrome shows it as net::ERR_PROXY_UNABLE_TO_CONNECT_TO_DESTINATION, error -186. puppeteer and Playwright report the same name when a page fails to load in Chromium.

ERR_PROXY_UNABLE_TO_CONNECT_TO_DESTINATION in the screenshot API

When the page itself fails to load with ERR_PROXY_UNABLE_TO_CONNECT_TO_DESTINATION, the API answers 502 with the message The target website could not be loaded (ERR_PROXY_UNABLE_TO_CONNECT_TO_DESTINATION). (target_unreachable). Not billed.

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.

Check whether a website loads

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Format

Full page Block ads

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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/v1/take documentation Screenshot API All documentation

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

# Response: the image (PNG, JPG, WebP or GIF)
curl -G "https://api.screenshotbase.com/v1/take" \
  --data-urlencode "url=https://example.com" \
  -d viewport_width=1280 -d viewport_height=800 \
  -d format=png \
  -H "apikey: YOUR-API-KEY" \
  -o screenshot.png

More free tools

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.