# Inline validation

Checking a field as the person fills it in, before they submit.

**Source:** “a 22% increase in success rates,” [Inline Validation in Web Forms (A List Apart)](https://alistapart.com/article/inline-validation-in-web-forms/)

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Published 2026-10-29. Web page: https://www.mackenziebowes.com/reference/glossary/inline-validation