Get your free HTML form validation script

Create free web forms with HTML form validation scripts as easy as 1-2-3, using a simple HTML form validation script or the 123FormBuilder web form builder.

contact form with free form validation script

Get better data with built-in form validation.

contact form editor with validation options

If you want to receive only relevant and complete messages, then yes, – HTML form validation is a must! It helps you save time and reply to the important messages faster. Key features:

  • You get all the data you want (create required fields)
  • Data comes to you in the right format (valid email address or anything else on email forms)
  • Custom fields including single choice, multiple choice, textarea and dropdown lists
  • Advanced functionality like CAPTCHA image verification & conditional logic
contact form with validation error messages

What are HTML form validation scripts?

Validation scripts might sound complicated, but all they do is make sure that data is in the right format.

Whether it's a valid email address or a complete phone number, validation scripts make sure that the data you want arrives in the format you need.

At 123FormBuilder, we use something called "server-side form validation." It might sound complicated, but you just need to know that this is an accurate way to check data.

123FormBuilder generates validation scripts for any type of form or survey, such as online order forms and event registration forms. You name it.

If you want to get into more detail, we offer standard or custom validation for web forms.

Creating a simple form with HTML & JavaScript validation

Step 1: Create Your Form

To show you how form validation works, we'll create a sample HTML contact form with a few fields to validate:

  • Name field (check for input and maximum length)
  • E-mail field (check for correct email format and maximum length)
  • Address field (check for minimum and maximum length)
  • CAPTCHA, reCAPTCHA and country filters.

Step 2: Add Validation

Now that you have the HTML code for the form, all you have to do is add a little JavaScript form validation to check the data and highlight what needs fixing (if anything).

See it in action

If you want, you can test the HTML form validation script on JS Bin or JSFiddle, which are interactive editors that show you the code in action.

Great contact forms need more than just validation.

Create any type of web form you want with our drag-and-drop form builder and add Javascript validation with a few clicks. Next, you can publish the form on all the major platforms. It's super easy: no coding, no headaches.

Why validation?

If you want the data you need in the format you want, form validation is a must. It helps you save time, collect accurate data, display error messages and respond quickly when it matters most.

Check whether your HTML forms have valid information using a sample contact form and validation scripts.

mobile-responsive contact form with validation
Ready to use templates

Select a template that has HTML form validation included. Besides the ones presented below, we have more to offer in our free form templates gallery.

Online Feedback Form

Use this template
online feedback form template with validation

Add this contact form template to your website and get messages sent directly to your inbox. Modify this contact form template easily, no programming skills needed!

Use this template

Contact Form

Use this template
contact form template with validation

Use the sales lead form to generate leads and prospects for your business. Modify this lead form template with ease and publish it on your website.

Use this template

Enquiry Form

Use this template
enquiry form template with validation

Simplify the communication between your customers and your support team by sharing this support request form on your website.

Use this template
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Start building your free HTML form.