Free UTM Campaign URL Builder

Anatomy of a UTM-tagged URL

A campaign link is just your normal page URL with tracking parameters bolted onto the query string. The first parameter is joined with a ? and each one after it with an &, so/landing becomes/landing?utm_source=newsletter&utm_medium=email&utm_campaign=spring_sale. This builder assembles that for you and URL-encodes every value, so a stray space or ampersand in a campaign name can’t break the link or truncate your data.

Naming conventions that keep your reports clean

Analytics groups traffic by the exact strings you send, so inconsistency — not missing tags — is what usually wrecks a campaign report. Two habits fix most of it:

• Reuse the same source and medium spellings everywhere. The channel presets above fillsource and medium with standard values (email, cpc, social) so links from different campaigns still roll up together.
• Never put raw spaces in a value. The builder flags them and lowercases everything by default; use underscores or plus signs instead so “spring sale” and “spring_sale” don’t split into two rows.

utm_id and GA4 campaigns

GA4 adds an optional utm_id field, which is not the same asutm_campaign. The campaign name is the human-readable label; the campaign ID is a stable identifier you can match against ad-platform or cost data, so spend and conversions line up in reporting. Set it when you import campaign costs into GA4 — leave it blank and the other five parameters still track traffic perfectly.