JSON formatter & validator
Format, beautify, validate, and minify JSON online. Pinpoint syntax errors by line and column, sort keys, and copy or download the result.
UTM builder
Build UTM campaign URLs for Google Analytics. Add source, medium, campaign, term, and content, then copy or make a QR code.
Presets — fill source & medium in one click
More GA4 parameters
Recent links
Tag many pages for many channels at once. Every URL is combined with every channel line, and the campaign, ID, term, and GA4 parameters from Single link are applied to all of them.
Leave Channels empty to use the source and medium from Single link. A CSV with columns url, source, medium, campaign, content, term, id can also be pasted into Page URLs — each row is then used as-is.
| Page | Source | Medium | Content | Campaign URL |
|---|
How to use UTM builder
Build UTM-tagged campaign URLs so Google Analytics and other tools can attribute traffic from emails, ads, and social posts.
utm_source(required): where the traffic comes from, like google or newsletterutm_medium: the channel, like cpc, email, or socialutm_campaign,utm_id,utm_term, andutm_contentfor finer tracking
Values are lowercased and spaces become underscores, which avoids split reports. Existing query parameters and #anchors are kept. Your last 10 links are saved in this browser.
More than one link at a time
- Presets for newsletters, Google Ads, Facebook and Instagram, LinkedIn, X, YouTube, affiliates, and SMS — or save your own
- Bulk links: combine many page URLs with many channels at once, or paste a CSV, then copy every link or download a CSV for your campaign sheet
- Check a tagged URL: break any campaign link back into its parameters, spot mistakes, and get the clean URL without UTMs
- The newer GA4 parameters
utm_source_platform,utm_creative_format, andutm_marketing_tactic
The tool also warns about the mistakes that break reports: capital letters (GA4 is case-sensitive), spaces, a missing medium, mediums GA4's default channels don't recognise (which end up as Unassigned), duplicated parameters, and UTMs placed after the # where analytics can't see them.
UTM builder FAQs
Is UTM builder free?
UTM builder is a free online tool on ReallyUseful.Tools. No account is required.
Does UTM builder run in my browser?
UTM builder is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
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