ERR_BLOCKED_BY_CLIENT — What It Means & How to Fix It

What Does This Error Mean?

ERR_BLOCKED_BY_CLIENT means a browser extension — usually an ad blocker or privacy tool — is preventing a request from being made. The word 'client' here refers to your browser. The block is happening on your side, not the server's. The extension saw a request it was configured to block (such as an ad, a tracker, or a specific URL) and stopped it before it even left your browser.

Affected Models

Google Chrome
Microsoft Edge
Brave
Firefox
Chromium-based browsers
Windows
macOS

Common Causes

An ad blocker extension (uBlock Origin, AdBlock Plus) is blocking a request it has identified as an ad or tracker
A privacy extension is blocking third-party scripts or resources on the page
A parental control or content filtering extension is blocking the entire page or specific resources
The website is trying to load resources from a domain that your extension's blocklist includes
A corporate browser policy is blocking specific content types or URLs

How to Fix It

Open the page in an Incognito window (Ctrl+Shift+N in Chrome). Incognito runs without extensions by default. If the page loads, an extension is causing the block.

This is the quickest way to confirm an extension is responsible.
Disable your ad blocker for this specific site. Click your ad blocker's icon in the toolbar and look for a 'Pause on this site' or 'Whitelist' option.

This allows the site to load normally while keeping your ad blocker active on all other sites.
If the above does not help, disable all extensions temporarily. Go to chrome://extensions and toggle off each one. Reload the page and enable them one by one to find the culprit.

Sometimes privacy extensions or anti-tracking tools — not just ad blockers — cause this error.
Check if the site you are trying to load is blocked by your browser's built-in Safe Browsing or any enterprise policy. Type chrome://policy in the address bar to see active policies.

On work or school computers, administrators can enforce URL blocking policies.
Clear your browser cache and cookies and try again. In Chrome, press Ctrl+Shift+Delete, select All time, and clear all data.

Occasionally, a cached block decision can persist even after an extension's rules change.

When to Call a Professional

If this error appears on a work computer and is blocking a site you need for your job, contact your IT department. They control which browser policies and extensions are enforced on work devices.

Frequently Asked Questions

Does ERR_BLOCKED_BY_CLIENT mean the website is dangerous?

Not necessarily. Ad blockers block content based on lists of known ad servers and trackers. Sometimes they block legitimate content by mistake. The block is based on pattern matching, not actual threat detection. If you trust the site, whitelist it in your extension to see if the content loads safely.

Why does only part of the page fail to load?

Ad blockers block individual requests, not the whole page. The main page content might load fine while certain ads, analytics scripts, or comment widgets are blocked. This is actually the intended behaviour of ad blockers. If something important is missing from a page, it may have been caught by the filter.

Can I see what specific request was blocked?

Yes. Open Chrome's Developer Tools by pressing F12 and go to the Network tab. Refresh the page and look for requests with a status of 'blocked' or ERR_BLOCKED_BY_CLIENT. This shows you exactly which URL or resource was blocked, helping you decide whether to whitelist it.