Chrome network error · -111 · Connection

ERR_TUNNEL_CONNECTION_FAILED

Chrome is set to use a proxy, and the proxy could not open a tunnel to the website. The proxy was reached, the site through it was not.

Chromium's description

A tunnel connection through the proxy could not be established. For more info see the comment on PROXY_UNABLE_TO_CONNECT_TO_DESTINATION.

Chrome shows it as net::ERR_TUNNEL_CONNECTION_FAILED, error -111. puppeteer and Playwright report the same name when a page fails to load in Chromium.

Common causes

A proxy configured in the system or browser that refuses or cannot reach the site.
A proxy that needs authentication or blocks the domain or port.
A broken VPN or proxy extension.
The target website itself is down, seen through the proxy.

How to fix ERR_TUNNEL_CONNECTION_FAILED

Turn off the proxy in the system or browser settings (or set it to automatic) and retry.
Disable proxy and VPN extensions.
Check with whoever runs the proxy whether the site is allowed.
Flush DNS and socket pools at chrome://net-internals.

ERR_TUNNEL_CONNECTION_FAILED in the screenshot API

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

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Frequently asked questions

What does ERR_TUNNEL_CONNECTION_FAILED mean?

Chrome is set to use a proxy, and the proxy could not open a tunnel to the website. The proxy was reached, the site through it was not.

How do I fix ERR_TUNNEL_CONNECTION_FAILED?

Turn off the proxy in the system or browser settings (or set it to automatic) and retry.

Is a screenshot that fails with ERR_TUNNEL_CONNECTION_FAILED billed?

No. Requests the screenshot API answers with an error are not billed.

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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