# UTM Builder

> Agent-friendly Markdown of https://www.buildseo.org/free-tools/utm-builder — full index for AI agents: https://www.buildseo.org/llms.txt

Assemble campaign URLs with source, medium, and campaign parameters.

## How it works

Enter your landing-page URL and the campaign parameters — source, medium, campaign, plus optional term and content — and the builder assembles a correctly encoded URL live.

Existing query strings on the base URL are preserved; parameter values are URL-encoded so spaces and special characters never break the link.

Everything runs in your browser. Nothing is sent to a server.

## Frequently asked questions

### What's the difference between source and medium?
Source is where the traffic comes from (newsletter, google, linkedin); medium is the channel type (email, cpc, social). Analytics groups by both.

### Should UTM values be lowercase?
Yes — analytics tools treat Email and email as different values, so pick a lowercase convention and stick to it.

## Track the clicks. We'll grow the referrers.

UTMs measure traffic; backlinks create it. BuildSEO AI wins verified placements that send referral traffic worth tagging.

---

[All free tools](https://www.buildseo.org/free-tools.md) · [BuildSEO AI](https://www.buildseo.org/index.md)