Base64 in CSS Data URIs: Inline Images and Fonts
Use CSS data URIs with Base64-encoded images and fonts to reduce HTTP requests. Learn the syntax, size limits, and performance trade-offs.
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Tags: encoding, css, base64
Base64 in CSS Data URIs: Inline Images and Fonts CSS data URIs let you embed images and fonts directly in a stylesheet — no separate HTTP requests for those assets. The technique is the same as in HTML: replace a URL with a scheme string containing the Base64-encoded content. Both render identically in the browser. The difference is entirely in how the asset is loaded. When CSS Data URIs Make Sense The classic argument for data URIs was reducing HTTP requests — on HTTP/1.1 with its 6-connection-per-host limit, each request had real cost. On HTTP/2 and HTTP/3, multiplexing makes this less relevant. That said, data URIs in CSS still have genuine use cases: Single-file component delivery — A CSS file meant to be dropped into any environment, with no dependency on external asset paths Small…
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