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Maintain Image Quality When Applying CSS Transform & Scale
The CSS image-rendering property controls how browsers scale and display images, especially when transforms and scaling are applied. This property helps maintain image quality by specifying which algorithm the browser should use for image scaling.
Syntax
selector {
image-rendering: value;
}
Possible Values
| Value | Description |
|---|---|
auto |
Default value. Browser chooses the scaling algorithm automatically |
smooth |
Smooths out colors and reduces pixelation |
high-quality |
Provides higher-quality scaling with better algorithms |
crisp-edges |
Preserves contrast and edges, ideal for pixel art |
pixelated |
Uses nearest-neighbor algorithm when scaling up |
Example: Comparing Different Rendering Methods
The following example demonstrates how different image-rendering values affect image quality when scaling −
<!DOCTYPE html>
<html>
<head>
<style>
.container {
display: flex;
gap: 20px;
flex-wrap: wrap;
}
.image-box {
text-align: center;
}
img {
width: 120px;
height: 120px;
border: 2px solid #ccc;
display: block;
margin-bottom: 10px;
}
.smooth { image-rendering: smooth; }
.crisp { image-rendering: crisp-edges; }
.pixelated { image-rendering: pixelated; }
.high-quality { image-rendering: high-quality; }
</style>
</head>
<body>
<div class="container">
<div class="image-box">
<img class="smooth" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHJlY3Qgd2lkdGg9IjQwIiBoZWlnaHQ9IjQwIiBmaWxsPSIjRkY2B0I0Ii8+CjxyZWN0IHg9IjEwIiB5PSIxMCIgd2lkdGg9IjIwIiBoZWlnaHQ9IjIwIiBmaWxsPSIjMDA3QkZGIi8+Cjwvc3ZnPgo=" alt="Test Image" />
<p>smooth</p>
</div>
<div class="image-box">
<img class="crisp" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHJlY3Qgd2lkdGg9IjQwIiBoZWlnaHQ9IjQwIiBmaWxsPSIjRkY2B0I0Ii8+CjxyZWN0IHg9IjEwIiB5PSIxMCIgd2lkdGg9IjIwIiBoZWlnaHQ9IjIwIiBmaWxsPSIjMDA3QkZGIi8+Cjwvc3ZnPgo=" alt="Test Image" />
<p>crisp-edges</p>
</div>
<div class="image-box">
<img class="pixelated" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHJlY3Qgd2lkdGg9IjQwIiBoZWlnaHQ9IjQwIiBmaWxsPSIjRkY2B0I0Ii8+CjxyZWN0IHg9IjEwIiB5PSIxMCIgd2lkdGg9IjIwIiBoZWlnaHQ9IjIwIiBmaWxsPSIjMDA3QkZGIi8+Cjwvc3ZnPgo=" alt="Test Image" />
<p>pixelated</p>
</div>
<div class="image-box">
<img class="high-quality" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIHZpZXdCb3g9IjAgMCA0MCA0MCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHJlY3Qgd2lkdGg9IjQwIiBoZWlnaHQ9IjQwIiBmaWxsPSIjRkY2B0I0Ii8+CjxyZWN0IHg9IjEwIiB5PSIxMCIgd2lkdGg9IjIwIiBoZWlnaHQ9IjIwIiBmaWxsPSIjMDA3QkZGIi8+Cjwvc3ZnPgo=" alt="Test Image" />
<p>high-quality</p>
</div>
</div>
</body>
</html>
Four scaled images are displayed side by side, each demonstrating different rendering methods. The smooth version appears softer, crisp-edges maintains sharp boundaries, pixelated shows distinct pixel blocks, and high-quality provides the best overall scaling.
Example: Image Rendering with CSS Transform
This example shows how image-rendering affects images when combined with CSS transforms −
<!DOCTYPE html>
<html>
<head>
<style>
.transform-container {
display: flex;
gap: 30px;
align-items: center;
justify-content: center;
margin: 50px 0;
}
.scaled-image {
width: 60px;
height: 60px;
transform: scale(2.5);
border: 1px solid #ddd;
}
.smooth-transform {
image-rendering: smooth;
}
.crisp-transform {
image-rendering: crisp-edges;
}
.label {
text-align: center;
margin-top: 20px;
font-weight: bold;
}
</style>
</head>
<body>
<div class="transform-container">
<div>
<img class="scaled-image smooth-transform" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjAiIGhlaWdodD0iMjAiIHZpZXdCb3g9IjAgMCAyMCAyMCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHJlY3Qgd2lkdGg9IjIwIiBoZWlnaHQ9IjIwIiBmaWxsPSIjRkY1NzIyIi8+CjxyZWN0IHg9IjUiIHk9IjUiIHdpZHRoPSIxMCIgaGVpZ2h0PSIxMCIgZmlsbD0iIzAwN0JGRiIvPgo8L3N2Zz4K" alt="Small Image" />
<div class="label">Smooth + Scale</div>
</div>
<div>
<img class="scaled-image crisp-transform" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjAiIGhlaWdodD0iMjAiIHZpZXdCb3g9IjAgMCAyMCAyMCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHJlY3Qgd2lkdGg9IjIwIiBoZWlnaHQ9IjIwIiBmaWxsPSIjRkY1NzIyIi8+CjxyZWN0IHg9IjUiIHk9IjUiIHdpZHRoPSIxMCIgaGVpZ2h0PSIxMCIgZmlsbD0iIzAwN0JGRiIvPgo8L3N2Zz4K" alt="Small Image" />
<div class="label">Crisp-edges + Scale</div>
</div>
</div>
</body>
</html>
Two scaled images appear side by side with a 2.5x transform scale. The smooth version appears softer with blended edges, while the crisp-edges version maintains sharp, defined boundaries even when scaled up.
Conclusion
The image-rendering property is essential for maintaining image quality during scaling operations. Use crisp-edges for pixel art and icons, smooth for photographs, and high-quality for the best overall results.
Updated on: 2026-03-15T15:23:16+05:30
2K+ Views
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