Why build the thank-you URL first
A thank-you page is the last step of a browser form POST. You want a stable https URL, optional campaign tags, and no secrets in the query string. Building the URL in a small tool is faster than hand-editing UTM pairs and easier to paste into form settings.
This generator runs in your browser. It does not create the thank-you page for you and it does not call the FormsReach API.
Dashboard redirect, not a form field
FormsReach sends the visitor to your URL after a successful accept. You enable redirect in the dashboard and paste a full https URL. The product does not read a _redirect field from the form. If you add one, it is just another submitted value, not a redirect instruction.
See Redirect and thank-you. Keep the API key off the thank-you URL.
What UTM parameters do
utm_source, utm_medium, and utm_campaign tell analytics which form or campaign produced the visit to the thank-you page. utm_content and utm_term are optional. Turn the UTM block off if you want a clean path. Extra key/value rows cover things like ref=homepage.
FormsReach fit
Pair this URL with a form that posts to https://api.formsreach.com/submit. Generate that markup with the HTML form tool if you need it. If the contact page also needs schema, use the JSON-LD generator. Neither tool invents dashboard fields.