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Simple Captcha Validation Using HTML CSS JavaScript

JavaScript CAPTCHA Validation

Javascript captcha validation is a common web element that makes a website more secure. Custom Captcha is mainly used in the login forms, registration forms, and contact forms.

In this article, I have shown how to create Simple Captcha Validation using JavaScript. Here you will find the captcha HTML code for free. With it, you will get step by step tutorial.

JavaScript CAPTCHA Validation

Captcha Validation protects the website from spammers. It is used to identify robots or bots. Since you are a programmer, you know that spamming a website can easily be done using loops of different program languages. 

Like you are creating a contact form so that the user can message manually. However, using a programming language, automatic messaging can be done at a certain time. Captcha Validation JavaScript is used to prevent this type of spam.

See the Pen
by Shantanu Jana (@shantanu-jana)
on CodePen.

In the case of Captcha Validation, basically from two boxes and a button. A box will contain some pictures or some captcha code. You have to input in another box by looking at those characters. If you input incorrectly, your message will not be sent.

Create Custom Captcha in HTML CSS & JavaScript

If you want to create this Custom Captcha using JavaScript then follow the tutorial below. Html, CSS, and javascript have been used to create this Simple Captcha Validation.

There is basically a display where random Captcha code can be seen. There is another input box to input the Captcha code. It has a submit button that will submit your input Captcha.

Step 1: Basic structure of Custom Captcha

The basic structure of Captcha Validation has been created using the following code. A box has been created here on the webpage. 

This project (Custom Captcha in JavaScript) has width: 400px, height: 200px and background color white.

<body onload=”Captcha();”> 
  <div class=”capt”> 
  background-color: rgb(7, 112, 209);
  font-family: sans-serif;
  width: 400px;
  border-radius: 5px;
  position: absolute;
  transform: translate(-50%,-50%);
  top: 50%;
  left: 50%;   
Basic structure of Custom Captcha

Step 2: Captcha code viewing display

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