UTM Link Builder

Append standardized UTM parameters to any URL for GA4 — auto-lowercased, one consistent separator, no more Facebook vs facebook. Built in your browser.

Destination

The landing page the link points to. No https://? We add it. Existing ?params and #fragments are preserved.

Required UTM parameters

WHO sent the traffic — the platform or referrer. This is the field most prone to the Facebook/facebook/FB split.

HOW it arrived. This drives GA4's channel grouping — pick from the list to avoid (Other)/Unassigned. Note: organic is non-standard for paid links — GA4 identifies organic search by the source (e.g. google), not a medium value.

The specific campaign or promotion. Groups all of a campaign's links together in reports.

Optional UTM parameters (emitted only when filled)

Paid-search keyword.

A/B creative variant.

Only for GA4 cost-data / Data Import. Most users leave this blank.

Standardization

GA4 is case-sensitive. Lowercase is the core fix.

Replaces spaces. Pick one, apply everywhere.

Your tagged URL

—
parametervalue GA4 records
Fill the destination URL plus source, medium & campaign to build your link.
What was standardized
No changes yet.

UTM Link Builder — guide & how to use

What it does

This free UTM link builder appends standardized campaign parameters (utm_source, utm_medium, utm_campaign and the optional utm_term, utm_content, utm_id) to any destination URL so Google Analytics 4 can attribute the click correctly. Its whole reason to exist is consistency: it auto-lowercases every value and substitutes a single word separator, so Facebook, facebook, and FB stop fragmenting one campaign into three report rows. Everything runs in your browser — nothing you type is sent anywhere or stored.

How to use it

  1. Paste your destination URL (the page the link should land on).
  2. Set the three required tags: source (who), medium (how — pick from the list), and campaign (which promotion).
  3. Add term, content, or ID only if you need them.
  4. Keep Naming style = lowercase and pick one separator for your whole team.
  5. Click Copy URL and use it in your ad, email, or post.

Worked example

You enter the destination https://shop.com/pool-care, source Facebook, medium paid_social, campaign Summer Sale 2026, with lowercase style and the hyphen separator. The tool trims, lowercases, swaps spaces for hyphens, and percent-encodes each value, producing:

https://shop.com/pool-care?utm_source=facebook&utm_medium=paid_social&utm_campaign=summer-sale-2026

The breakdown shows utm_source = facebook, utm_medium = paid_social, utm_campaign = summer-sale-2026; the channel preview reports Paid Social; and the standardization note records Facebook → facebook (lowercased) and Summer Sale 2026 → summer-sale-2026 (spaces → hyphen).

The GA4 channel rules (best-effort preview)

GA4 sorts traffic into a Default Channel Grouping using fixed regex rules that "aren't case sensitive and can't be edited." The medium drives most of them:

Channel assignment also weighs whether the source matches Google's internal Search/Social/Shopping source lists, so the preview here is a best-effort indication of the medium rule, not a guarantee of final GA4 attribution.

Accuracy & honesty notes

How to embed this tool on your website

No account, no coding. Copy the embed code and paste it where you want it to appear:

Embeddable in one line — copy the ready-made snippet from the box below.

Frequently asked questions

What are UTM parameters and why must they be consistent?

They are tags appended to a URL so GA4 can attribute a visit to a campaign. GA4 values are case-sensitive, so Facebook, facebook, and FB are three sources — splitting one campaign across three rows. Forcing lowercase with one separator is the core fix this tool applies.

Which parameters are required?

Three: utm_source (who), utm_medium (how), utm_campaign (which). utm_term, utm_content, and utm_id are optional and only added when filled.

What's the difference between source and medium?

Source is WHO sent the traffic (facebook, newsletter); medium is HOW it arrived (cpc, email, social). Swapping them breaks channel grouping. Medium should come from the recognized vocabulary.

Why did my traffic land in (Other) / Unassigned?

GA4 assigns channels via fixed regex on utm_medium. A free-typed medium like "newsletter" matches nothing. Use email for newsletters and social/paid_social for Facebook. The channel preview flags this before you ship.

My URL already has a "?" or UTM tags — what happens?

Non-UTM params (gclid, ref) are kept and joined with "&", never a second "?". Existing utm_ keys are overwritten, not duplicated. A #fragment is split off and re-attached at the very end.

Should I tag internal links?

No — tagging links between your own pages starts a new GA4 session and corrupts source/medium attribution. Only tag links that bring people to your site from outside.

Related tools

Invoice Generator · Free Receipt Maker · Quote Generator · Purchase Order Generator · Proforma Invoice Generator · Commercial Invoice Generator

Put this UTM builder on your site

Free, one line, no account. Great for an agency, a marketing team handbook, or a campaign-ops page.

<!-- UTM Link Builder — height is ~1180px; nudge it if your layout clips -->
<iframe src="https://snaptoolsuite.com/utm-link-builder/?embed=1"
  style="width:100%;max-width:560px;height:1180px;border:0;"
  title="UTM Link Builder" loading="lazy"></iframe>
2 Paste it on your page
3 It just works

Built locally in your browser. Nothing you type — URLs, campaign names, sources — is ever sent, logged, or stored.