Free tool

Form endpoint tester

Send a test submission to any form endpoint, as form data, JSON or multipart, and see the status code, response and timing. Works with Formpit, Formspree, Web3Forms, your own API, or anything that accepts a POST.

Request

Endpoint URL The default is Formpit's echo endpoint, which shows back what it received. Real endpoints receive a real submission. Send as

Fields

“Send test” uses JavaScript, so the endpoint must allow browser requests (CORS). “Normal form post” opens a new tab, exactly like a visitor submitting a form.

Response

Send a test to see the response here.

Reading the result

200 or 201: accepted. Many backends, Formpit included, answer {"ok":true} when you send Accept: application/json.
302 or 303: accepted and redirecting to a thank-you page (normal for a plain form post).
400 or 422: the endpoint rejected the data; the response body usually says which field.
403: blocked, often by a domain lock or captcha requirement on the form.
404: wrong URL or form ID. 429: rate limited; wait and retry.
Request blocked with no status: the endpoint doesn't allow browser requests from other sites (CORS). Try “Send as a normal form post”.

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