Why inline SVG as a CSS data URI?

Inlining SVGs as data URIs eliminates extra HTTP requests, prevents flash of unstyled content (FOUC) on icons, and keeps your assets self-contained in the stylesheet. It's especially useful for small icons and UI elements.

Should I use URL-encoded or Base64?

URL-encoded is usually smaller for SVG because SVG is text-based. Base64 adds ~33% overhead. This tool shows both sizes so you can compare and pick the best option for your case.

Is my SVG data sent to a server?

No. Everything happens in your browser. Your SVG never leaves your machine — there are no server uploads or API calls.

What SVG optimization does the tool do?

The tool removes unnecessary whitespace, XML declarations, comments, and redundant attributes before encoding. This produces smaller data URIs without changing how the SVG renders.

Can I use data URI SVGs in all browsers?

Yes. CSS data URIs with SVG are supported in all modern browsers including Chrome, Firefox, Safari, and Edge. They've been widely supported since IE9.

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Convert SVG to
CSS Data URIs

Paste your SVG markup and get copy-ready CSS for background-image, mask-image, and list-style-image — URL-encoded or Base64. Optimizes SVG, compares sizes, and shows a live preview.

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Data URI Output

Instantly convert SVG to URL-encoded or Base64 data URIs for use in CSS background-image properties.

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Multiple CSS Properties

Get ready-to-copy CSS for background-image, mask-image, and list-style-image with a single paste.

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Optimized & Compared

SVG is cleaned up before encoding. See size comparisons between URL-encoded and Base64 to pick the smallest.

Frequently Asked Questions

Everything you need to know about SVG to CSS Converter.

Convert SVG toCSS Data URIs

Data URI Output

Multiple CSS Properties

Optimized & Compared

Frequently Asked Questions

Convert SVG to
CSS Data URIs