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How To Do Email Validation in JavaScript?

As many of you guys actually know that JavaScript is a free open source programming language that you can use to do email validation in JavaScript. Hands down JavaScript is the fastest and the most lightweight programming language than any other programming language. Many programmers use Javascript only to build stunning web pages and landing pages even web applications.

But most JavaScript users don’t know they could use also do Email Validation for absolutely free in JavaScript. If you didn’t know this earlier don’t worry. Here we are with another informational post. After reading this post completely to the end you will be able to do email validation in JavaScript.

What Is Email Validation?

Email validation is a process to validate your email list or users signed up to your list or webpage. It runs a detailed scan throughout your email list or user list and validates all your emails and users. This process can help you clean up invalid emails and users. An email validation process will make your email list clean and improve the bounce rate.

Basically, email validation can be really helpful if you are not that sure about your deliverability issue. Email validation is the best way to solve it. It higher the open rates of your email campaigns. Email marketing has the highest ROI of any other marketing method. And you can’t reach the ROI without the help of email validation. If you are validating an HTML form then email validation is really important.

What You Need To Know Before Validating Emails?

As I already mentioned that email validation is a very very important part if you are validating an HTML form. A full email contains basically two parts. An “@” mark defines the difference between the two parts. The first part is personal info and the second part is the domain name of the email provider. It can be a custom domain or free email providers such as,, or

The first part which is the personal information part can contain the following characters:

  • Uppercase & Lower Case Characters
  • Numeric Characters
  • Special Characters
  • Also Period, Dot & Full Stop. But Keep In Mind That These Cannot Be At The First Or At The Last Part Of The Personal Information Part In An Email.

And now let’s see what the second part of the domain name could contain:

  • Letters (Uppercase or Lowercase Doesn’t Matter In The Domain Name)
  • Digits
  • Hyphens
  • Dots

We will probably use a regular expression to validate email addresses now. Because it’s the easiest way to do this.

How To Do Email Validation in JavaScript?

How To Do Email Validation With JavaScript?

Below is the easiest way to get started with email validation in JavaScript.

function ValidateEmail(inputText)
var mailformat = /^w+([.-]?w+)*@w+([.-]?w+)*(.w{2,3})+$/;
alert("You have entered a valid email address!");    //The pop up alert for a valid email address
return true;
alert("You have entered an invalid email address!");    //The pop up alert for an invalid email address
return false;

Now you can apply JavaScript to our HTML form.

<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<title>JavaScript email validation</title>
<link rel='stylesheet' href='form-style.css' type='text/css' />   //link to the source file of css to add styles
<body onload='document.form1.text1.focus()'>
<div class="mail">
<h2>Enter email to Validate</h2>
<form name="form1" action="#">
<li><input type='text' name='text1'/></li>
<li> </li>
<li class="Validate"><input type="submit" name="Validate" value="Validate" onclick="ValidateEmail(document.form1.text1)"/></li>  //Adding the submit button
<li> </li>
<script src="email-validation.js"></script>    //link to the source file of javascript function

Now you can add some style and look to your HTML form.

li {list-style-type: none;
font-size: 16pt;
.mail {
margin: auto;
padding-top: 10px;
padding-bottom: 10px;
width: 800px;
background : rgb(153, 198, 211);
border: 1px soild rgb(1, 20, 24);
.mail h2 {
margin-left: 38px;
input {
font-size: 20pt;
input:focus, textarea:focus{
background-color: lightyellow;
input submit {
font-size: 10pt;

Now you’re all set up. Check the output to verify that you have successfully done email validation in JavaScript.

How To Do Bulk Email Validation Fast?

If you’re reading till here you already know how to validate emails in JavaScript. Also, I don’t need to explain again that you can’t do bulk email validation fast with this method. So, how can you validate the bulk number of emails like 1,000 emails, 10,000 emails, or even 100,000 emails? The answer is simple. You need to try out tools for that. Keep in mind that to do proper bulk email validation with high accuracy you need to use some tools. These tools have paid and free plans. But with free plans, you can’t really do email validation. Because the monthly limit for email validation would be around only 100 emails.

On the other hand, if you’re going with a paid plan you have mainly two options one is a pay-as-you-go plan and one is a monthly plan. The first plan as you can tell by the name provides you with a certain amount of email validation capability. And the monthly plan is also a good plan but you are burdened to the limit. But it’s hassle-free. So, you have to choose which one you wanna go with.

So, which one to use which is the best and the cheapest? Which one can you start with? A simple way to find out is to check out my other post where I describe the Best Email Validation Services Of 2022 With Details & Pricing. It’s a great article that is helping people find the best email validation service for their business in 2022. So do check that out. But if you want to know the best tool to use on this page then, my recommendation would be:


If you have any questions do let me know in the comments. I will be more than happy to help you. Also, don’t forget to check out my other blog posts.

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