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JavaScript Privacy stackoverflow.com

Stack Overflow: strip tracking params from links

Cleans on-page links of utm and ref parameters so your clicks no longer carry tracking data.

Code to copy

/* Strip tracking query parameters from on-page links */
(function () {
  var JUNK = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'cb', 'ref'];
  function clean() {
    document.querySelectorAll('a[href*="?"]').forEach(function (a) {
      if (a.dataset.sofClean) return;
      a.dataset.sofClean = '1';
      try {
        var u = new URL(a.href, location.href);
        JUNK.forEach(function (p) { u.searchParams.delete(p); });
        a.href = u.toString();
      } catch (e) { /* ignore malformed urls */ }
    });
  }
  clean();
  new MutationObserver(clean).observe(document.body, { childList: true, subtree: true });
})();

How to use this example

  1. Copy the code with the button above.
  2. Install JustZix (2 minutes) and open the extension on the target page.
  3. Add a new rule matching that page.
  4. Paste the code into the rule's JavaScript panel and save — it runs on every page visit.

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