CSS Data URI Converter

Upload an image and instantly generate CSS with an embedded Base64 data URI. Perfect for inline backgrounds, icons, and reducing HTTP requests.

Last Updated: July 2026

Drag & Drop Upload

Drop any image (PNG, JPG, GIF, SVG, WebP) or click to browse — instant conversion.

Auto-Generate CSS

Get a complete CSS class with background-image, background-size, and embedded Base64 data URI.

One-Click Copy

Copy the generated CSS code or raw data URI with a single click — ready to paste into your stylesheet.

Live Preview

See a preview of your image alongside the generated CSS to verify everything looks correct.

100% Client-Side — Your data never leaves your device

Drop an image here, or click to browse

Supports PNG, JPG, GIF, SVG, WebP

Upload an image to generate CSS with an embedded Base64 data URI

1

Upload Image

Drag & drop or browse to select any image file (PNG, JPG, GIF, SVG, WebP).

2

Auto-Generate CSS

The tool converts your image to Base64 and generates a complete CSS class with background-image.

3

Copy & Use

Copy the generated CSS code and paste it directly into your stylesheet.

Why this tool is safe

Your data never leaves your device — everything runs in your browser.

No server uploads. Other tools send your files to their servers. Ours don't.
Zero tracking of content. We never see, store, or log anything you convert.
Works offline. Once loaded, the tool works without an internet connection.

Frequently Asked Questions

Search below or browse through our most commonly asked questions.

It's a way to embed a Base64-encoded image directly into a CSS file using the background-image property, saving an HTTP request.
For small icons, it improves load time by reducing requests. For large images, it drastically bloats your CSS file, causing render-blocking delays.