UTM link checker
A free UTM link checker and parameter validator. Paste a tagged URL to find missing or empty utm_source, utm_medium and utm_campaign, duplicate parameters, capital letters, spaces, typos and tags placed after a #. It runs in your browser and never fetches the link.
Paste a campaign link and see at once whether its UTM tags will report cleanly in Google Analytics. The checker lists every parameter it finds and flags missing utm_source, utm_medium or utm_campaign, empty values, duplicates, capital letters, spaces, typos like utm_sorce, tags placed after a # and a second ?. It only reads the text you paste: nothing is fetched, uploaded or stored, so it cannot tell you whether the page itself loads.
Frequently asked questions
What does a UTM link checker check?
It reads the query string of the URL you paste and checks the UTM tags against the rules analytics tools rely on: utm_source, utm_medium and utm_campaign present and not empty, each parameter appearing once, lowercase names and values, no spaces, no typos in the parameter name, and no tags hidden after a # fragment.
Which UTM parameters are required?
Google Analytics 4 needs utm_source, utm_medium and utm_campaign to report a campaign. utm_term and utm_content are optional, as is utm_id. A link without the required three is usually filed as direct or unassigned traffic.
Why does capitalisation matter in UTM values?
Reports treat Email and email as two different values, so one campaign is split across several rows that each look smaller than it was. Keeping every value lowercase avoids that.
Does this tool open the link or check that the page loads?
No. It only analyses the text you paste, in your browser. It does not visit the URL, follow redirects or send your link anywhere, so it cannot detect a broken page or a redirect that drops the tags.
Why are my UTM tags ignored after a # in the URL?
Browsers never send the part of a URL after # to the server, and analytics tags that read the query string do not see it. UTM parameters must come before the #.
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