UTM Parameter Validator

Verify your UTM tracking parameters survive the full redirect chain and reach the final landing page intact. Catch attribution data loss before it impacts your reporting.

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What this tool checks

Parses all 5 standard UTM parameters from the final URL
Detects non-standard utm_* parameters
Checks UTM values are lowercase (Google Analytics best practice)
Verifies UTMs survive every redirect hop
Validates utm_source + utm_medium + utm_campaign completeness
Runs desktop and mobile paths simultaneously

UTM parameters reference

utm_source

The traffic source (e.g. google, newsletter, instagram)

Example: google

utm_medium

The marketing medium (e.g. cpc, email, social)

Example: cpc

utm_campaign

Campaign name for grouping related ads

Example: brand_q1

utm_term

Paid keyword (optional)

Example: running+shoes

utm_content

Ad variation for A/B testing (optional)

Example: hero_cta

Frequently asked questions

What happens if UTM parameters get stripped?

Your analytics platform (Google Analytics, Mixpanel, etc.) records the session as direct/none instead of the paid channel. This causes underreporting of paid traffic ROI and makes attribution analysis unreliable.

Can redirects strip UTM parameters?

Yes. Many URL shorteners, CDNs, and redirect scripts only forward the path and query string from the original URL — but some strip or rewrite query parameters. LinkDecoder follows the entire chain and shows you exactly where parameters are dropped.

Should UTM values be lowercase?

Yes. Google Analytics 4 treats 'Google' and 'google' as different sources. Best practice is to always use lowercase values to avoid data fragmentation in your reports.

Do I need all 5 UTM parameters?

Source, medium, and campaign are the three essential parameters. Term is used for paid search keywords; content is optional and used for creative A/B testing. LinkDecoder scores completeness based on the three required params.

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