ZapBounce

ZapBounce and Webflow

Webflow forms post to Webflow's servers by default, which means there is no server-side hook where you can inspect a submission before it is stored.

That leaves two routes, and the choice between them decides whether the customer ever sees a correction.

The default form handler gives you nowhere to intervene

A standard Webflow form submits, Webflow stores it, and a webhook fires afterwards. Verification in that webhook tells you about a bad address after the visitor has left the page.

That is still useful for list hygiene and useless for catching a typo, because the person who could fix it in two seconds has gone.

Redirecting the form to a custom endpoint gives you the pre-submission moment, at the cost of losing Webflow's built-in submission storage.

How the data moves

  1. For hygiene, use the form submission webhook

    Webflow fires a webhook on submission. Verify there and write the verdict into whatever CRM or sheet receives the lead.

  2. For typo correction, post to your own endpoint

    Change the form action to your own handler, verify, and return the suggestion to the page before storing.

  3. Keep the key server-side either way

    A custom form handler runs on your infrastructure. Webflow's client-side code should never hold the key.

  4. Return the suggestion to the visitor

    Only the custom-endpoint route can do this, and it is the one that recovers a lost lead.

Setting it up

  1. Decide whether you need typo correction or only list hygiene.
  2. For hygiene, register a Webflow form submission webhook pointing at your handler.
  3. For correction, change the form action to your own endpoint and handle the submission yourself.
  4. Verify server-side, with a two-second timeout and fail-open behavior.
  5. Return the did_you_mean suggestion to the page where you control the handler.
  6. Write the verdict alongside the lead in your CRM.

Webflow: common questions

Can I verify before a Webflow form submits?

Only by posting to your own endpoint instead of Webflow's. The built-in handler gives you no pre-submission hook.

Will I lose Webflow's form submissions list?

With a custom endpoint, yes. You store them yourself, which is the trade for being able to correct a typo.

Where does the key go?

Your server. Webflow's page code is public, and so is anything in it.

Reference

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