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Matomo Blocked by Ad Blockers (Undercounting Visitors)

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Workaround available Matomo Cloud, Matomo On-Premise Updated November 13, 2026Based on 3 user reportsHow we research

Quick answer

Ad blockers and privacy extensions can stop Matomo's tracker and cause 5-10% fewer visits than other tools. Test in a clean window, then serve the tracker from your own domain to reduce blocking.

Most likely fix: Confirm blocking

How to fix it

Try these in order — the most common fix is first.

  1. 1. Confirm blocking

    1. Open Developer Tools > Network and look for blocked matomo.js or matomo.php requests
    2. Retest in a clean browser window
    Did this fix it?

  2. 2. Serve the tracker from your own domain (community approach)

    1. Proxy the tracker through a path on your own site with neutral file names
    2. Pass the visitor's real IP via trusted forwarded headers, or every visitor will appear with the proxy IP
    3. This is a community workaround, not an official Matomo feature, and does not bypass consent
    Did this fix it?

  3. 3. Accept a small gap

    1. Matomo says some blockers will always cause a 5-10% gap compared with server-side counts
    2. Use server logs if you need a complete count
    Did this fix it?

Symptoms

Matomo shows fewer visits than other tools, or requests to matomo.js and matomo.php fail with net::ERR_BLOCKED_BY_CLIENT.

Why it happens

  • uBlock Origin, AdGuard, Brave or other blockers filtering matomo.js and matomo.php
  • Tracker loaded from a recognisable Matomo domain
  • Do Not Track honoured by default
  • Consent banner delaying tracking

This guide also covers

  • matomo adblock
  • matomo blocked by ad blocker
  • matomo.js blocked

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