UTM Link Builder

Key features

• Fills website URL plus utm_source, utm_medium, utm_campaign and the optional utm_term and utm_content fields, then rebuilds the link live about a quarter second after you stop typing.
• Uses the browser's URL API to append parameters, so existing query strings survive untouched and every value is percent-encoded exactly once — never double-encoded.
• One-tap preset chips for common sources (google, newsletter, linkedin…) and mediums (cpc, email, social, organic…) keep naming consistent across campaigns.
• Validates the base URL and nudges you with a hint when source or medium is missing — the two fields GA4 reports need most.
• Keeps your last five built links in a localStorage history with per-row copy, so a new variant never destroys the previous one.

How it works

1. 1

   Paste the destination URL

   Enter the full page address including https://. If it already carries query parameters they are preserved exactly as they are.

2. 2

   Fill the campaign fields

   Type utm_source, utm_medium and utm_campaign (or tap a preset chip), then optionally add term and content for keyword or A/B detail.

3. 3

   Copy the finished link

   The encoded URL appears live in the preview box. Copy it to your clipboard, open it in a new tab to sanity-check, or save it to the history row below.

Tips for better results

• 💡Decide on lowercase naming conventions before your first campaign — GA4 treats Newsletter and newsletter as two different sources.
• 💡utm_content is the classic slot for A/B tags: banner-a versus banner-b on the same ad keeps reports readable.
• 💡Existing tracking parameters in the destination URL are kept, so migrating an old link to proper UTM tags loses nothing.

Frequently asked questions