UTM Builder

Build trackable UTM URLs from campaign source, medium and name.

UTM parameters are the standard tags you append to a URL so that Google Analytics (GA4) can tell which channel a visitor came from — paid ads, newsletters, social posts and more. This UTM builder takes a base URL plus utm_source, utm_medium, utm_campaign and friends and generates a clean campaign tracking URL in real time.

Every value is URL-encoded automatically, and any existing query string or hash (#) on the base URL is merged correctly instead of being broken. That removes the typos, duplicate question marks and missing encoding you get when stitching URLs together by hand.

Base URLThe destination page to track. e.g. https://example.com/landing

utm_source (required)Traffic source. e.g. google, newsletterutm_medium (required)Marketing medium. e.g. cpc, email, socialutm_campaign (required)Campaign name. e.g. summer_sale

utm_term (optional)Paid keyword.utm_content (optional)Ad creative or A/B test variant.

Fill in utm_source, utm_medium and utm_campaign.

The five UTM parameters

These are the standard UTM parameters GA4 understands. The first three should almost always be filled in.

utm_source: where the traffic came from. e.g. google, newsletter
utm_medium: the marketing medium. e.g. cpc, email, social, banner
utm_campaign: the campaign name. e.g. summer_sale, 2026_launch
utm_term: paid keyword (optional). e.g. running+shoes
utm_content: A/B test or creative variant (optional). e.g. top_banner, text_link

Consistent naming is everything

UTM values are case-sensitive. Google and google are counted as two different sources in GA4, which splits your data. Your reports stay clean when the whole team follows the same rules.

Always use lowercase.
Replace spaces with underscores (_) or hyphens (-) consistently.
Maintain a shared, documented list of approved source/medium/campaign values.

Building the final URL

The tool safely encodes each value with encodeURIComponent, then appends only the UTM parameters while preserving any existing query string and hash on the base URL. Copy the finished link with one click and paste it into your ad platform or post. To go the other way and break an existing tracking link back into its parameters, use the UTM parser.

Frequently asked questions

Which of source, medium and campaign are required?

Technically all UTM parameters are optional, but for GA4 campaign reports to make sense you should always fill in source, medium and campaign. This tool requires those three.

Can I use spaces or non-Latin characters in values?

Yes. Values are URL-encoded automatically to produce a safe link. For readable reports, though, prefer lowercase ASCII and replace spaces with underscores.

What if my base URL already has a ? or #?

Existing query strings and hashes are preserved and the UTM parameters are merged in correctly, so you never get duplicate question marks or a broken fragment.

Is my URL sent to any server?

No. Everything runs in your browser; the URL and values you enter are never transmitted to any server.

Does capitalization matter?

Yes. GA4 treats UTM values as case-sensitive, so Email and email become different mediums. Standardize on lowercase across your team.