CheckWebsiteNow

Other browser errors

ERR_BLOCKED_BY_CLIENT

Something in your browser blocked this page or part of it.

Quick answer

The block happened on your side, not at the website. Ad blockers, privacy extensions or browser policies often stop requests that look like ads or tracking.

When to wait: Waiting does not help; change the blocking setting.

If you are visiting the website

  1. Look at your blocker's icon Most ad blockers show an icon or counter next to the address bar. Click it to see what was blocked on this page.
  2. Allow the site in your blocker If you trust the site, add it to the allow list of your ad blocker for this one site only. You do not need to switch the blocker off everywhere.
  3. Try a private window Open the site in a private (incognito) window, where extensions are off unless you allowed them there. If it works, an extension is the cause.
    Windows
    Chrome or Edge: press Ctrl+Shift+N.
    macOS
    Chrome or Edge: press Cmd+Shift+N.
    ChromeOS
    Chrome: press Ctrl+Shift+N.
  4. Turn off extensions one at a time Ad blockers, privacy tools and security add-ons can block files. Turn them off one by one to find the cause, then turn the others back on.
    Windows
    Chrome: More (three dots) > Extensions > Manage extensions, then use each switch. Edge: open edge://extensions.
    macOS
    Chrome: More (three dots) > Extensions > Manage extensions, then use each switch. Edge: open edge://extensions.
    ChromeOS
    Chrome: More (three dots) > Extensions > Manage extensions.
    Linux
    Chrome: More (three dots) > Extensions > Manage extensions.
  5. Check your security software Antivirus tools often add their own browser extension or web filter. Check its blocked list or pause its web protection for one test, then turn it back on.
  6. Check for company or school management If the Chrome menu says "Managed by your organization", open chrome://management or chrome://policy to see what was installed. Ask your IT team rather than trying to remove these settings yourself.

If you run the website

  1. Find which files are blocked Open the browser developer tools (F12) with a blocker installed. In the Console or Network panel, blocked requests show net::ERR_BLOCKED_BY_CLIENT next to the file name.
  2. Avoid ad-like names File names or paths that contain words like ad, ads, banner or track can match public filter lists. Rename essential files and folders.
  3. Do not let core features depend on blocked scripts Analytics, advertising and tag scripts are commonly blocked. Load your main content, login and checkout without them, and handle errors so a missing script does not break the page.
  4. Serve essential files from your own domain Scripts and fonts loaded from third-party hosts are more likely to be on filter lists. Host files that your page truly needs yourself.
  5. Test with common blockers Check that your key pages still work with popular blockers and strict privacy settings turned on.

What this error is not

It is not a server error and not a sign that the website is down. The request never left your browser, because something inside the browser stopped it.

If CheckWebsiteNow says the site is responding while you see this error, that confirms the block is on your side.

Is it the website or me?

It is your side, by definition: "client" means your browser. A block by a company URL list usually shows a different message, ERR_BLOCKED_BY_ADMINISTRATOR.

The website can still make its pages sturdier, so that blocked extras do not break the main content.

For site owners: why real visitors hit this

Blockers use public filter lists that match file names, paths and third-party domains. A harmless file such as an image called ad-banner can be caught by a pattern.

Analytics, chat widgets and payment helpers loaded from other domains are caught for the same reason.

Common questions

Is it safe to turn off my ad blocker?

For a site you trust, allowing it on that one site is reasonable. You do not need to turn the blocker off for every site.

Why does the page load but a video or button is missing?

The blocker often stops only one file, such as a video player or form script. The rest of the page loads, so the error shows up only in the developer console or as a broken part.

My work computer shows this on many sites. What can I do?

Company policies or security extensions may block those requests on purpose. Ask your IT team, because changing managed settings yourself can break workplace rules.

Does this error mean my computer has malware?

No. It means a blocking tool did its job. Only look closer if you see an extension you do not recognise; then remove it on the extensions page.

Likely causes

  • Common An ad blocker or privacy extension. (Your side)
  • Sometimes A browser policy set by your school or company. (Your side)

Is the website down? Check it now

One measurement point. Results explain what we saw, not a worldwide verdict.

Sources

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