Image to Base64 Converter

What Image to Base64 does

This tool converts any image into a Base64-encoded string, letting you embed the image directly inside HTML or CSS without a separate image file — useful for small icons, inline emails, or self-contained code snippets.

How to use it

1. Choose an image file.
2. Click Copy Base64 string for the raw encoded string, or Copy as CSS background-image for a ready-to-paste CSS rule.

Common uses

• Embedding a small icon or logo directly inside an HTML or CSS file without a separate request.
• Creating a self-contained HTML email that doesn't rely on externally hosted images.
• Inlining an image for a single-file code demo or documentation snippet.
• Embedding a small background image directly in CSS to avoid an extra HTTP request.
• Converting an image for use in contexts where linking to an external file isn't practical.

Good to know

Base64 encoding increases file size by roughly 33% compared to the original binary image, so this technique works best for small icons and images — embedding large photos this way bloats page weight and hurts load performance, which is the opposite of what you usually want.

The roughly 33% size increase from Base64 encoding comes from a fundamental tradeoff in how the encoding works — it represents binary data using only safe, printable text characters, and that safety constraint means each group of 3 raw bytes needs 4 encoded characters to represent, which is the exact source of the size overhead.