SVG Encoder

SVG Encoder converts SVG markup into an embeddable string in three common formats: Base64, a percent-encoded data URI, and a ready-to-paste CSS background declaration. Encoding lets you inline a vector image directly into HTML, CSS, or JavaScript so the browser does not need to make a separate network request to fetch the icon. This is especially useful for small, frequently used graphics where the round-trip cost of an extra request outweighs the bytes of inlining.

The tool offers two encoding strategies because they have different trade-offs. Base64 produces a guaranteed-safe ASCII string but inflates the data by roughly a third. Percent-encoding (URL-encoding) keeps the SVG mostly human-readable and is usually smaller than Base64 for text-heavy SVG, which is why it is often preferred for CSS data URIs. The CSS background output wraps the encoded SVG in a background-image: url(...) declaration so you can paste it straight into a stylesheet.

Common use cases include embedding icons as CSS backgrounds, inlining decorative shapes in design systems, shipping a single-file HTML page with no external assets, and storing small graphics in JavaScript or JSON. Inlining also avoids CORS and caching quirks that sometimes affect external SVG references, and it makes a component fully self-contained.

To keep data URIs short, always run the SVG through the SVG Optimizer before encoding, since every removed byte directly shortens the string. Prefer percent-encoding over Base64 for CSS backgrounds when the SVG is simple, as it tends to be smaller and easier to debug. Be mindful that very large SVGs make for unwieldy strings and may hurt readability or stylesheet size, so reserve inlining for small icons and consider the SVG to JSX Converter when you need a true component instead.