"This product changed my life! It's the best investment I've ever made."
"Fantastic support and a beautiful design. Highly recommended!"
"Simple to use and extremely effective. A+ experience."
In this tutorial, we’ll create an amazing auto-slide testimonial section using HTML, CSS, and JavaScript. This sleek and responsive design will automatically showcase client reviews or feedback in a smooth carousel format — perfect for websites, portfolios, or landing pages. Whether you’re a beginner or looking to polish your frontend skills, this project is a great way to practice DOM manipulation, CSS transitions, and responsive layouts.
Features:
-
Auto-sliding testimonial carousel
-
Clean and modern UI
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Responsive design for all devices
-
Simple JavaScript logic
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Testimonial Slider</title>
<style>
.main {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
margin: 0;
padding: 0;
}
.slider-container {
max-width: 600px;
margin: 100px auto;
background: white;
padding: 40px;
border-radius: 10px;
box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
position: relative;
overflow: hidden;
}
.testimonial {
display: none;
text-align: center;
transition: opacity 0.5s ease-in-out;
}
.testimonial.active {
display: block;
}
.testimonial img.author-img {
width: 100px;
height: 100px;
border-radius: 50%;
object-fit: cover;
margin-bottom: 20px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.testimonial p {
font-size: 18px;
line-height: 1.6;
color: #333;
margin: 20px 0;
}
.testimonial .author {
margin-top: 10px;
font-weight: bold;
color: #555;
}
.slider-buttons {
text-align: center;
margin-top: 30px;
}
.slider-buttons button {
background: #3498db;
border: none;
color: white;
padding: 10px 20px;
margin: 0 10px;
border-radius: 5px;
cursor: pointer;
font-size: 16px;
transition: background 0.3s;
}
.slider-buttons button:hover {
background: #2980b9;
}
</style>
</head>
<body>
<div class="main">
<div class="slider-container">
<!-- Testimonials -->
<div class="testimonial active">
<img decoding="async" src="https://devcodejourney.com/wp-content/uploads/2025/05/Develop-Code-Journey-Watermark.png"
alt="dev code journey" class="author-img" />
<p>"This product changed my life! It's the best investment I've ever made."</p>
<div class="author">– Jane Doe</div>
</div>
<div class="testimonial">
<img decoding="async" src="https://devcodejourney.com/wp-content/uploads/2025/05/Develop-Code-Journey-Watermark.png"
alt="devcodejourney" class="author-img" />
<p>"Fantastic support and a beautiful design. Highly recommended!"</p>
<div class="author">– John Smith</div>
</div>
<div class="testimonial">
<img decoding="async" src="https://devcodejourney.com/wp-content/uploads/2025/05/Develop-Code-Journey-Watermark.png"
alt="devcode journey" class="author-img" />
<p>"Simple to use and extremely effective. A+ experience."</p>
<div class="author">– Alex Lee</div>
</div>
<!-- Buttons -->
<div class="slider-buttons">
<button onclick="prevTestimonial()">Prev</button>
<button onclick="nextTestimonial()">Next</button>
</div>
</div>
</div>
<script>
let current = 0;
const testimonials = document.querySelectorAll('.testimonial');
function showTestimonial(index) {
testimonials.forEach((testimonial, i) => {
testimonial.classList.remove('active');
if (i === index) {
testimonial.classList.add('active');
}
});
}
function nextTestimonial() {
current = (current + 1) % testimonials.length;
showTestimonial(current);
}
function prevTestimonial() {
current = (current - 1 + testimonials.length) % testimonials.length;
showTestimonial(current);
}
setInterval(nextTestimonial, 5000); // Auto-slide every 5 seconds
</script>
</body>
</html>
