Base64 Image Encoder

Convert images to Base64 strings for embedding in CSS or HTML. Generate data URIs for icons and logos without external HTTP requests — free, local processing.

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Technical Audit

This utility is a high-performance node optimized for modern browser environments. All data processing is executed client-side, ensuring zero knowledge transfer to external servers.

Drag-and-drop image encoding
CSS background-image snippet generation
HTML img src data URI output
Instant Base64 decoding

System FAQ

How do I convert an image to Base64 online?

Drag and drop your image (JPG, PNG, SVG, WEBP) or click to upload. The tool instantly generates the Base64 string, ready to use as a data URI in CSS or HTML.

When should I use Base64 images in CSS?

Use Base64 encoding for small images like icons, logos, and UI elements (under 5KB). This eliminates HTTP requests for these assets, which can slightly improve performance. For large images, external URLs are better.

How do I use a Base64 image in CSS?

Use it as a background-image: background-image: url('data:image/png;base64,iVBORw0KGgo...'); The tool automatically generates this CSS snippet ready to copy.

How do I use a Base64 image in HTML?

Use it as the src attribute of an img tag: <img src='data:image/png;base64,iVBORw0KGgo...'/>. The tool generates this HTML snippet for you.

Does Base64 encoding make images larger?

Yes. Base64 encoding increases file size by approximately 33% compared to the binary original. This is a trade-off — you save an HTTP request but the data is larger. It's worth it for very small images but not for large photos.