How to Use Base64 Images in HTML

Learn when data URIs are useful and why large Base64 images can affect performance.

A data URI embeds encoded image data in HTML. This can help with tiny icons or self-contained demos, but large Base64 images add page weight and reduce normal separate-file caching benefits.

Practical next step

Choose the right workflow for your file, inspect the output and keep an original copy whenever quality or metadata matters.