Check a URL's UTM parameters before you publish it.
Paste a tagged link, see every parameter broken down, and catch the mistakes that quietly split your reports. Runs entirely in your browser.
Nothing you paste here leaves your browser — it's parsed and checked locally.
Most tagging mistakes are invisible until the report is wrong.
A URL with a typo'd UTM parameter opens exactly like a correct one — the difference only shows up weeks later, as a channel that doesn't add up.
- Missing utm_source or utm_medium — the two Analytics groups traffic by, so a link tagged with only one won't classify consistently
- Uppercase letters in a UTM value — "Facebook" and "facebook" report as two different rows, not one
- Spaces inside a value — a plain-text email or SMS client truncates the link at the first one
- A parameter that looks like it's meant to be utm_something but is misspelled, so analytics silently ignores it
Building a link from scratch?
The free UTM builder picks source and medium from a fixed list so the mistakes this checker looks for can't happen in the first place.
Want every link checked automatically?
A ClickTrail workspace validates UTM tagging on every link you create and watches that the destination keeps working after you publish — not just once, up front.
Start freeNeed to check the destination itself, not just the tags?
Try the free link checkUTM checker, answered honestly.
If something here doesn't match what the tool does, that's a bug — tell us.
What does this tool actually check?
It parses the URL you paste and flags missing utm_source/utm_medium, uppercase letters in a value, stray spaces, duplicate parameters, and parameter names that look like a misspelled UTM tag.
Does it fix the URL for me?
No — it only reports what's wrong. Use the free UTM builder to construct a corrected version from scratch.
Is my URL sent to a server?
No. Parsing happens entirely in your browser using the WHATWG URL parser — nothing you paste here is sent anywhere.
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