UTM Builder

Each field becomes one parameter on the end of your address. The link updates as you type.

1. Enter the page address in Website URL. If you leave out https:// the tool adds it, and an unusable address shows "Enter a valid website URL".
2. Fill in the three starred fields: Campaign source (utm_source), such as newsletter; Campaign medium (utm_medium), such as email; and Campaign name (utm_campaign), such as spring_sale.
3. Add the optional Campaign ID (utm_id), Campaign term (utm_term) for paid keywords and Campaign content (utm_content) to tell two links apart.
4. Take the link from Generated campaign URL with Copy, or use Download .txt.

The note under the result says "All required parameters set" or lists which of source, medium and campaign are missing. It is a reminder only, and the link is still built.

For the page https://www.example.com/sale with source newsletter, medium email, campaign spring_sale and content header_button, the output is:

https://www.example.com/sale?utm_source=newsletter&utm_medium=email&utm_campaign=spring_sale&utm_content=header_button

The parameters always appear in the order source, medium, campaign, term, content, id. Values are trimmed and percent-encoded, so a space becomes a plus sign and an ampersand becomes %26. The tool does not change case, so write values in lowercase yourself. Any query string already on the address is kept, but it is re-encoded in the process. If the address already holds a utm parameter that you fill in, the new value replaces it, and if you leave a field blank the matching parameter is removed. A bare domain gains a trailing slash, and a # fragment stays at the very end.

As a second example, the address https://example.com/shop?id=5#top with the source typed as news letter, medium email and campaign Spring&Sale becomes https://example.com/shop?id=5&utm_source=news+letter&utm_medium=email&utm_campaign=Spring%26Sale#top. That output is correct, but it also shows why spaces and capitals are worth avoiding: your report would list the source as news letter and keep the capital S.

Analytics tools read the tags when the page loads. In Google Analytics 4 they feed the session source, medium and campaign dimensions, with term and content appearing as manual term and manual ad content. Values are case sensitive, so Email and email show as two entries. GA4 uses source and medium to sort sessions into default channels, so common values such as email, cpc and social are usually safer than invented ones; check Google's channel definitions for the exact rules.

• Use lowercase everywhere and one separator, such as an underscore, with no spaces.
• Keep a short fixed list of sources and mediums and reuse them exactly.
• Put the year or version in the campaign name, such as black_friday_2026.
• Use utm_content for variants inside one campaign, such as two buttons in the same email.
• Never tag links between pages of your own site, since the tag replaces the visitor's original source.
• If Google Ads auto-tagging is on, check how it interacts with manual tags before adding them to ads.

To print a tagged link as a code, use the QR code generator. For readable page addresses, try the URL slug generator, for page titles and descriptions the meta tag generator, and for encoding stray characters the URL encoder. Nothing you type is uploaded.

Finally, keep a record. A shared sheet with the final link, the campaign name, the channel and the launch date means that next quarter nobody has to guess what promo2 meant. The builder does not store anything, so copy each link into that sheet as you make it.