Create Text Format Conversion Tool by using HTML, CSS and JavaScript

 Hi to all, in this article I am going to tell you all about, how to create text format (Upper Case or Lower Case) conversion tool.

This will works once user has added the text which need to convert in the text box and after need to select whether to convert uppercase or lowercase and then, the total text will be converted into selected case and then user can copy it.

A text format conversion tool's purpose is to enable users to quickly and easily convert text between various formats, including case conversions (uppercase to lowercase or vice versa) and other transformations. 

The tool's goal is to be user-friendly and intuitive, requiring little effort from the user while producing accurate and timely results.

Create Text Format Conversion Tool by using HTML, CSS and JavaScript
Create Text Format Conversion Tool by using HTML, CSS and JavaScript

How to Create Text Format Conversion Tool

The below are the detailed steps provided to create a simple website pagination in HTML, CSS and JavaScript.

  • Make a folder. You can create the aforementioned files inside of this folder and give it any name you choose.
  • Make a file named index.html. The file extension must be .html.
  • Make a file named style.css. its extension must be included in the file name as .CSS.

  • Make a file named script.js. The file extension must be .js.

Building the Foundation with HTML

HTML forms the backbone of any web-based application. 

In our case, it provides the structure for the user interface. 

We start by creating a container div to hold our tool, complete with input fields and buttons.

<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Text Format Conversion Tool</title>
    <link rel="stylesheet" href="style.css">
    <div class="container">
        <h1>Format Conversion Tool</h1>
        <label for="textInput">Enter Text:</label>
        <textarea id="textInput" placeholder="Enter text here..."></textarea>
        <label for="selectFormat">Select Format:</label>
        <select id="selectFormat">
            <option value="uppercase">Uppercase</option>
            <option value="lowercase">Lowercase</option>
        <button onclick="convertText()">Convert Text</button>
    <script src="script.js"></script>

Styling with CSS

CSS is employed to enhance the visual appeal of our tool. 

It ensures that the elements are laid out logically, creating an aesthetically pleasing and responsive design.

        body {
            font-family: 'Arial', sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f4f4f4;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100vh;

        .container {
            max-width: 400px;
            background-color: #fff;
            padding: 20px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            border-radius: 8px;

        textarea {
            width: 100%;
            height: 100px;
            margin-bottom: 10px;

        button {
            background-color: #4caf50;
            color: #fff;
            border: none;
            padding: 10px 20px;
            cursor: pointer;

        button:hover {
            background-color: #45a049;

Adding Functionality with JavaScript

JavaScript is the engine that powers our conversion tool. 

It captures user input, performs the desired transformation, and displays the results seamlessly.

function convertText() {
            // Get the text input and selected format
            var inputText = document.getElementById('textInput').value;
            var selectedFormat = document.getElementById('selectFormat').value;

            // Perform the conversion based on the selected format
            var convertedText;
            if (selectedFormat === 'uppercase') {
                convertedText = inputText.toUpperCase();
            } else if (selectedFormat === 'lowercase') {
                convertedText = inputText.toLowerCase();

            // Display the converted text in the input area
            document.getElementById('textInput').value = convertedText;


Format Conversion Tool


Finally, the Text Format Conversion Tool we created shows how HTML, CSS, and JavaScript can be seamlessly integrated to produce a user-friendly and efficient solution. 

Because of its ease of use and potential for growth, it is accessible to individuals with varying technical skills and allows for future improvements. 

We've created a tool that not only solves an issue but also does so in a way that appeals to its users by putting innovation and user experience first. 

These kinds of technologies are like guiding lights in the huge field of web development, offering both innovation and usefulness as we go.

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