Query String Builder
Add parameters one by one and get a correctly encoded URL — great for UTM campaign links.
How it works
Keys and values are percent-encoded with encodeURIComponent, so characters like &, =, #, spaces and accents can't break the URL. Existing parameters in the base URL are kept.
FAQ
What are UTM parameters?
utm_source, utm_medium and utm_campaign tell analytics tools (like Google Analytics) where a visitor came from.