UTM Builder & Campaign Link Generator

Broken UTM links are a self-inflicted reporting hole

A newsletter that ships utm_source = Newsletter one week and utm_source=news letter the next week splits one channel into three rows in GA4. Spaces, mixed case, a second ? on a URL that already has ref=, and a forgotten utm_medium are the usual causes. This builder starts from https://veomark.com, source newsletter, medium email, campaign summer_sale. Force lowercase is on. Spaces become hyphens unless you pick underscores. The result updates as you type.

The base URL is required and must parse as http or https. A missing scheme gets https:// prepended. Invalid hosts surface an alert and disable copy. Source and medium cannot be empty after trim. Campaign, term, and content may be blank; empty optional keys are omitted rather than sent as empty strings. Existing query parameters stay in place. Example: https://site.com/page?ref=123 plus the defaults becomes https://site.com/page?ref=123&utm_source=newsletter&utm_medium=email&utm_campaign=summer_sale.

url = new URL(base)
url.searchParams.set('utm_source', encodeURIComponent-safe value)
append with & when a query string already exists

Values are trimmed, spaces collapsed to a single hyphen or underscore, then passed through URLSearchParams, which encodes reserved characters. The breakdown table shows the human value and the encoded form so you can see a plus sign or percent-sequence before you paste into a ESP. Copy URL uses the Clipboard API with a 1px off-screen textarea fallback. Status text announces Copied! or Copy failed for two seconds.

Naming rules that keep reports joinable

Pick a vocabulary and stick to it. Common mediums: email, cpc, organic_social, affiliate, referral, qr. Common sources: newsletter, google, linkedin, partner_name. Campaign is the promotion name, not the channel. Term is for paid keywords. Content is the variant: header_cta vs footer_cta. If two people on the team invent different spellings, the table on this page is the contract: copy the URL, do not retype it in the email tool.

Force lowercase exists because analytics tools treat Newsletter and newsletter as different unless you add a cleanup rule. Some ad platforms require a specific case; turn the toggle off for those rows only. Hyphens are the default space replacement because they scan better in a long URL than underscores, but underscores match some older campaign taxonomies. Do not mix both in one account.

The QR code is the same string as the copy box, rendered locally. Print it on a slide, a poster, or a packing insert without sending the URL to a QR SaaS. If the tracking URL is unusually long (many leftover query params plus five UTM fields), the QR pane states the limit and the table still works. Scan the code once on a phone before you send 40,000 emails. Clear optional fields drops campaign, term, and content and rebuilds the URL from source and medium only.

Where this fits with the rest of Veomark

UTM links tell you which campaign produced the session. They do not tell you if the campaign paid back. Pair the URL with the ROAS Calculator and, for paid social, the CAC Payback Calculator. Instagram and TikTok engagement tools on this site answer a different question (are people interacting), not which link they clicked.

Do not put PII in utm_content. Do not use UTMs on every internal nav link or you will overwrite acquisition source. This builder will not stop those mistakes; it only stops syntax errors. If you need a JSON payload for a tag manager, convert it with the JSON to YAML Converter after you export, or keep it as JSON. The campaign URL itself should stay a single line you can paste into an href.

Frequently Asked Questions (FAQ)