---
title: FORM Butler – Web Forms Field Validation
description: "Fields can have validation. Set the validation in the \"Validation\" section of the Web Form configuration screen. Here is an example: - The field is set to \"Required\" - There is a Custom validation with Minimum and Maximum length ![](https://pdfbutler.com/wp-content/uploads/2024/11/Custom-Validation-length-1024x537.png)…"
url: "https://pdfbutler.com/academy/form-butler-academy/form-butler-web-forms/form-butler-web-forms-field-validation/"
updated: "2024-11-12"
category: Web Forms
---

# FORM Butler – Web Forms Field Validation

Fields can have validation. Set the validation in the "Validation" section of the Web Form configuration screen.
 Here is an example:

- The field is set to "Required"
- There is a Custom validation with Minimum and Maximum length

![](https://pdfbutler.com/wp-content/uploads/2024/11/Custom-Validation-length-1024x537.png)

 

See below for the validation in action:

![](https://pdfbutler.com/wp-content/uploads/2024/11/Custom-Validation-length-on-page-1024x537.png)

 

**Other option:**

- Custom with Regular Expression
- Email: Email validation
- Phone: Phone validation

![](https://pdfbutler.com/wp-content/uploads/2024/11/Custom-Validation-options.png)