To create a detailed WEBP to JPG/PNG/GIF converter using JavaScript and HTML, you can use the <canvas> element to manipulate and convert images. Below is a step-by-step guide to building a simple web-based converter.
Create a basic HTML structure with file input, format selection, and a button to trigger the conversion.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>WEBP to JPG/PNG/GIF Converter</title>
<style>
body {
font-family: Arial, sans-serif;
margin: 20px;
}
#preview {
max-width: 100%;
margin-top: 20px;
}
</style>
</head>
<body>
<h1>WEBP to JPG/PNG/GIF Converter</h1>
<input type="file" id="webpInput" accept=".webp" />
<select id="format">
<option value="jpg">JPG</option>
<option value="png">PNG</option>
<option value="gif">GIF</option>
</select>
<button id="convertBtn">Convert</button>
<div id="preview"></div>
<a id="downloadLink" style="display:none;">Download</a>
<script src="converter.js"></script>
</body>
</html>Create a converter.js file to handle the conversion logic.
document.getElementById('convertBtn').addEventListener('click', function() {
const fileInput = document.getElementById('webpInput');
const format = document.getElementById('format').value;
const preview = document.getElementById('preview');
const downloadLink = document.getElementById('downloadLink');
if (fileInput.files.length === 0) {
alert('Please select a WEBP file.');
return;
}
const file = fileInput.files[0];
const reader = new FileReader();
reader.onload = function(event) {
const img = new Image();
img.onload = function() {
const canvas = document.createElement('canvas');
canvas.width = img.width;
canvas.height = img.height;
const ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0);
canvas.toBlob(function(blob) {
const url = URL.createObjectURL(blob);
preview.innerHTML = `<img src="${url}" alt="Converted Image" />`;
downloadLink.href = url;
downloadLink.download = `converted_image.${format}`;
downloadLink.style.display = 'block';
}, `image/${format}`, 1.0);
};
img.src = event.target.result;
};
reader.readAsDataURL(file);
});- File Input: The user selects a WEBP file using the file input.
- Format Selection: The user selects the desired output format (JPG, PNG, or GIF).
- Conversion: When the "Convert" button is clicked, the script reads the WEBP file, draws it onto a canvas, and then converts it to the selected format using
canvas.toBlob(). - Preview and Download: The converted image is displayed in the preview area, and a download link is provided.
-
GIF Conversion: The above code converts a single WEBP image to a static GIF. For animated GIFs, you would need a more complex solution involving libraries like
gif.js. -
Browser Support: Ensure that the browser supports the WEBP format and the
<canvas>element. -
https://github.com/convert-apps/avif-to-jpg-png-webp
-
https://github.com/convert-apps/webp-to-png-jpg-gif
-
https://github.com/convert-apps/jpg-to-png-webp-jpeg
-
https://github.com/convert-apps/png-to-jpg-webp-ico
-
https://github.com/convert-apps/gif-to-jpg-png-webp
For more advanced features (e.g., animated GIFs, batch conversion), consider using libraries like:
- gif.js: For creating animated GIFs.
- libwebp.js: For more comprehensive WEBP manipulation.
This basic converter should work for most static WEBP images and provide a simple way to convert them to JPG, PNG, or GIF formats directly in the browser.