Free UTM Campaign URL Builder
Campaign links that report cleanly in GA4
Build clean, consistent campaign tracking links for Google Analytics 4. Tag one link or hundreds at once, catch the mistakes that split your reports (mixed case, spaces, unrecognised mediums), and see which GA4 channel your traffic will land in. Free, no signup.
Free plan · Single, bulk and reverse-engineer modes
Quick fill
Custom parameters (optional, up to 5)
Columns:
url, source, medium, campaign, then optionally term, content, id. Separate with commas, tabs (paste straight from a spreadsheet) or |. A header row and lines starting with # are skipped. Up to 100 rows.Paste a link you already use. We split it into its parts, flag problems such as duplicate parameters, capital letters and unrecognised mediums, and load it into the builder so you can fix it.
Naming rules
We don't open your link, so we can't tell whether the page loads or whether a redirect on it strips the parameters: click the finished link once to confirm. The GA4 channel shown is an approximation of Google's default rules. Only use UTM links that come from outside your site: on internal links they overwrite the visitor's real traffic source.
Working…
Your campaign link
Tag quality
0
out of 100
Expected GA4 channel
-
Approximate, based on Google's default channel grouping rules for this source and medium.
What's in the link
| Parameter | Value | What we did |
|---|
What to improve
Bulk results
| Link | Channel |
|---|
Link analysis
Links tagged. Is the page they land on any good?
Run the free website audit to check speed, on-page SEO and technical health of the pages your campaigns send people to.
Run Free Website AuditAbout the UTM Campaign URL Builder
UTM parameters are short tags added to the end of a link so your analytics tool knows exactly where a visit came from. utm_source says which site or platform sent the visitor, utm_medium says what kind of channel it was (email, social, cpc), and utm_campaign names the specific campaign. utm_content and utm_term tell apart different links or keywords within one campaign, and utm_id lets GA4 match your visits to imported ad-cost data.
The tags are simple, but small inconsistencies quietly damage the data. UTM values are case-sensitive, so
"Facebook" and "facebook" show up as two separate sources. A medium that GA4 doesn't recognise lands in
"Unassigned" instead of the channel you intended. Spaces and special characters turn into unreadable
%20 sequences, and a link that already carries old UTMs can end up tagged twice. This builder
prevents those problems as you work: it normalises your values, keeps existing parameters and your
#fragment intact, encodes everything safely, predicts the GA4 channel and scores the result.
Use the bulk builder to tag a whole campaign at once from a spreadsheet, and the analyzer to audit links already out in the wild. A good naming convention, lower-case and underscore-separated, kept in one shared document, matters more than any tool.