How to Resize an Image in HTML

Resizing images in HTML is essential for web development. Learn multiple methods to resize images using HTML attributes and CSS for responsive, optimized websites.

Method 1: Using width and height attributes

The simplest way to resize an image in HTML:

<img src="image.jpg" width="800" height="600" alt="Description">

Note: This sets the display size but doesn't change the actual file size. For better performance, resize images before uploading using our Bulk Image Resizer.

Method 2: Using CSS (recommended)

CSS gives you more control and is the modern approach:

<img src="image.jpg" style="width: 800px; height: auto;" alt="Description">

Or with a CSS class:

<style>
.resized-image {
  width: 800px;
  height: auto;
  max-width: 100%;
}
</style>
<img src="image.jpg" class="resized-image" alt="Description">

Method 3: Responsive images (best practice)

For responsive design, use percentage or viewport units:

<img src="image.jpg" style="width: 100%; max-width: 800px; height: auto;" alt="Description">

Or use the srcset attribute for different screen sizes:

<img src="image-small.jpg" 
     srcset="image-small.jpg 400w, image-medium.jpg 800w, image-large.jpg 1200w"
     sizes="(max-width: 600px) 400px, (max-width: 1200px) 800px, 1200px"
     alt="Description">

Resize images before uploading

While HTML can display images at different sizes, it's better to resize images before uploading to reduce file size and improve page load speed. Use our free Bulk Image Resizer tool:

1. Upload your images (up to 50 at once).
2. Set your desired dimensions.
3. Download optimized images.
4. Upload to your web server.

This reduces bandwidth usage and improves user experience.

Try it online (free)

• Bulk Image Resizer - Resize multiple images at once
• Resize Image for Instagram - Optimize for Instagram
• Resize Image for Facebook - Perfect Facebook dimensions
• Change image background

Tips for HTML image resizing

• Always set height: auto when setting width to maintain aspect ratio.
• Use max-width: 100% to prevent images from overflowing containers.
• Include the alt attribute for accessibility and SEO.
• Resize images to actual display size before uploading for better performance.
• Use modern formats like WebP with fallbacks for better compression.
• Consider using <picture> element for art direction and responsive images.

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