Free tool

UTM Builder

Build clean, consistent UTM-tagged URLs. Lowercase, no spaces, kebab-case applied automatically. Pick a preset or fill the fields manually.

Quick presets

Destination URL·Source · utm_source·Medium · utm_medium·Campaign · utm_campaign·Term · utm_term (optional)Content · utm_content (optional)ID · utm_id (optional, GA4)

Generated URL

Fill destination URL, source, medium and campaign to see your tagged URL here.

Naming conventions that save you

Lowercase, kebab-case for everything. utm_source=google_search not Google Search.
Pick one source name per platform and stick to it across all teams. Document the list once.
Never UTM-tag internal links. Internal taggings overwrite the original session source and orphan the conversion.
utm_id is optional but useful for matching back to ad-platform campaign IDs in BigQuery.