# UTM Builder

URL: https://tools.otaku-dojo.com/en/utm-builder
Updated: 2026-10-04

The UTM Builder adds utm_source, utm_medium, utm_campaign, utm_term and utm_content to your URL, creating a tracking link that separates traffic sources in Google Analytics 4. It converts spaces to underscores, lowercases values for consistent reporting, keeps the URL's existing parameters and replaces duplicate UTM parameters.

## How to use the UTM Builder

1. Enter the URL you are promoting.
2. Fill in utm_source, utm_medium and utm_campaign (required), plus optional utm_term and utm_content.
3. The tracking URL and its parameters appear instantly.
4. Press "Copy" and use it in ads, posts or newsletters — or turn it into a QR code.

## Specs & key facts

- **Parameters**: utm_source, utm_medium, utm_campaign, utm_term, utm_content
- **Automatic fixes**: Spaces to underscores, lowercase, keeps existing parameters, replaces duplicate UTMs
- **Required**: source, medium, campaign (GA4 recommendation)
- **Works with**: Google Analytics 4, Matomo and other UTM-aware analytics
- **Processing**: In your browser
- **Price**: Free, no sign-up

## Examples: Tracking link for a Facebook post

```text
URL: https://example.com/sale
source: facebook | medium: social | campaign: Autumn Sale 2026
```

→

```text
https://example.com/sale?utm_source=facebook&utm_medium=social&utm_campaign=autumn_sale_2026
```

## FAQ

### Should internal links have UTM parameters?

No. UTM tags on internal links start a new session and overwrite the original source, distorting your data. Use them only on external promotion links.

### Does capitalization matter?

Yes. GA4 is case-sensitive, so Facebook and facebook appear as two sources. The tool lowercases values by default.

### Do UTM parameters hurt SEO?

Not if your pages declare a canonical URL — search engines treat the tagged URL as the same page.