What Is Base64 Image Encoding?
Base64 image encoding converts an image file into a text-based string. Developers often use Base64 images in HTML, CSS, emails, and small embedded assets.
How Base64 Images Work
A normal image file is binary data. Base64 encoding changes that binary data into readable text characters. This text can then be placed directly inside HTML or CSS as a data URL.
data:image/png;base64,iVBORw0KGgoAAAANSUhEUg...
When Should You Use Base64 Images?
- • Small icons
- • Email templates
- • CSS background images
- • Tiny embedded assets
- • Avoiding extra image requests for very small files
Advantages of Base64 Images
- • Can be embedded directly in HTML
- • Useful for small assets
- • No separate image file needed
- • Helpful for email and inline designs
Disadvantages of Base64 Images
Base64 can make files larger than the original image. It is usually best for small images, icons, or simple embedded assets, not large photos or big website images.