UTM Link Builder

How to use the UTM link builder

1. Choose a Mode: Single URL to tag one page, or Bulk (many URLs) to paste a list of pages, one per line.
2. Enter the Page URL (or the Page URLs). If you leave out https://, this tool adds it and tells you.
3. Fill in Campaign source (utm_source), Campaign medium (utm_medium) and Campaign name (utm_campaign). The suggestions list common values such as google, newsletter, email or cpc.
4. Optionally add Campaign ID (utm_id), Campaign term (utm_term) and Campaign content (utm_content).
5. Tick Force lowercase values if you want every value converted to lowercase automatically.
6. Copy the Tagged URLs with Copy, save them as a text file with Download, or, in bulk mode, get a spreadsheet with Download CSV (original and tagged URL on each row). In single mode, Test the link opens the result in a new tab.

Everything runs in your browser: the URLs you paste are never sent anywhere.

What each UTM parameter means

UTM parameters are ordinary query-string parameters that analytics tools such as Google Analytics 4, Matomo or Plausible read when a visitor lands on your site. They tell you which campaign brought the visit, even when the referrer is missing (email apps, PDFs, QR codes, messaging apps).

• utm_source: who sends the traffic, for example google, newsletter or linkedin.
• utm_medium: the type of channel, for example email, cpc, social or display. GA4 uses source and medium to sort visits into default channel groups, so consistent mediums matter.
• utm_campaign: the name of the promotion, such as spring_sale_2026.
• utm_id: an identifier used to join campaign cost data imported into GA4.
• utm_term: the paid search keyword.
• utm_content: distinguishes two links in the same message, for example header_button and footer_link.

Source, medium and campaign are the three you should always fill in; this tool warns when one of them is empty.

How the URLs are built

This tool parses each address with the browser’s URL API, then rebuilds it carefully:

• Existing query parameters are kept exactly as they were written, in the same order. The UTM parameters are added after them.
• If the URL already contains a UTM parameter that you are setting, the old value is replaced (never duplicated) and a warning names it.
• The #fragment stays at the very end, after the query string, where browsers expect it. Putting UTM parameters after a # is a common mistake: the browser never sends the fragment to the server, and many analytics setups ignore it.
• Values are percent-encoded. Spaces become %20 rather than +, so the link means the same thing in every context; accented letters and characters such as & or = are encoded too.

Naming conventions that keep reports clean

UTM values are case-sensitive: Email, email and EMAIL show up as three different mediums. This tool warns about capital letters and about spaces, which are valid but awkward to read in reports. Pick a short list of mediums, write it down, and reuse it for every campaign. Underscores or hyphens (spring_sale) read better than %20.

Never tag internal links between pages of your own site: a click on a tagged internal link starts a new session attributed to that campaign and overwrites the real source.