Base64 Image Encoder
Encode images to Base64 string for embedding in HTML or CSS.
What is Base64 Image Encoding?
Base64 encoding converts binary image data into a text string that can be embedded directly inside HTML, CSS, or JSON. This eliminates a separate HTTP request for the image, which can improve performance for small icons and inline assets.
How to Use This Tool
- Upload your image file.
- The tool generates the Base64 string instantly.
- Copy the output and paste it into your HTML src attribute or CSS background-image property.
When to Use Base64 Images
Base64 encoding is most useful for: small icons under 2KB that are used on every page, CSS sprites alternatives, email HTML where external images may be blocked, and data URIs in SVG files. Avoid using Base64 for large images — the encoded string is ~33% larger than the original binary file, and large inline data URIs can slow down HTML parsing.
Usage Examples
In HTML: <img src="data:image/png;base64,iVBORw...">
In CSS: background-image: url("data:image/png;base64,iVBORw...");
Frequently Asked Questions
Does Base64 encoding increase file size?
Yes. Base64-encoded data is approximately 33% larger than the original binary file.
Is Base64 the same as encryption?
No. Base64 is encoding, not encryption. Anyone can decode a Base64 string — it provides no security.
