Bulk UTM Link Checker

How to use the UTM link checker

This UTM link checker reads every link in your sheet and tests its tags against Google's GA4 campaign URL rules and the default channel rules. It works on a whole spreadsheet at once and never opens the links, so it is fast and private.

1. Add your links. Drop in a CSV or Excel file, paste a column of links, or try the sample sheet first.
2. Check the columns. The tool finds the link column by itself (names like “Final URL”, “Website URL” or “link”). Add a name column so you can find each row later, and the “URL Tags” or “Final URL suffix” column if your export keeps tags separate.
3. Say where the links live. Choose “On my own website” to audit menu and banner links, and add your domain to catch typos like exmaple.com.
4. Read the problems. Each type of problem is listed once with the rows it affects and the fix. The bar chart shows how GA4 will group your links.
5. Download. Get the full results, a file with only the fixed links, or the list of source and medium pairs.

What every link is checked for

• Missing tags: no utm_source, utm_medium or utm_campaign (GA4 shows them as (not set)).
• Broken structure: a second ?, tags after #, &, raw spaces, repeated tags and misspelled names.
• Consistency: capital letters and the same source written two ways across the file.
• Leftovers: click IDs such as gclid copied from a clicked ad, email recipient IDs, and ad platform tags that were never filled in.
• GA4 channel: for the link exactly as written — a stray & or second ? often means Unassigned — and again for the fixed link, with a suggested source and medium.

What to do next

1. Fix the links where they live. Paste the fixed links back into your link sheet, email templates, social bios or ad platform fields.
2. Fix the template, not just the link. If many ads share a problem, change the shared setting once: Meta's URL parameters field, Google's Final URL suffix or your email tool's UTM settings.
3. Run the check again. Load the corrected file to confirm every row passes.
4. Watch GA4. Over the next days, Traffic acquisition should show fewer Unassigned and (not set) rows. Old visits keep their old values.

UTM link problems this checker finds

utm_campaign missing from the link

A link with only source and medium still counts, but the campaign shows as (not set). Google's advice is to always use all three tags.

Duplicate UTM parameters in one URL

Copying a template on top of an existing link often gives utm_source twice. Reports may keep the wrong one. The fixed link keeps the first value — check it is the one you want.

UTM parameters with spaces in the URL

“spring sale” typed into a link sheet leaves a raw space in the URL. A URL can't contain a raw space, so it has to be encoded as %20 — or written more readably as spring_sale.

A second question mark

?utm_source=x?utm_medium=y turns the medium into part of the source value. Only the first ? starts the tags; join the rest with &.

Click IDs and recipient IDs in shared links

A gclid or fbclid belongs to one ad click. When a link is copied from the browser after clicking an ad, every visitor through it carries that click ID. Mailchimp's mc_eid and Klaviyo's _kx identify the person who clicked an email, so never post links that contain them.

Tags on links inside your own site

A banner on your home page tagged utm_source=homepage names your own site as the source of the visit. Keep UTM tags for links placed elsewhere.