Base64 for Images: Embed PNGs and JPEGs Directly in HTML
Convert images to Base64 to embed them inline in HTML or CSS. Learn when inline images improve performance vs when external files are better.
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Tags: encoding, images, base64
Base64 for Images: Embed PNGs and JPEGs Directly in HTML Normally, an image in HTML is a separate HTTP request. The browser parses the HTML, encounters an tag, then fires a second request to fetch the image file. Base64 encoding eliminates that second request entirely — the image data lives directly in the HTML as a text string. This technique is called a data URI. Instead of a URL pointing to a file, the attribute contains the encoded image data itself. Here's what it looks like: That long string after is a 1×1 red PNG encoded as Base64. The browser decodes it and renders the image without any network request. How Data URIs Are Structured The format follows RFC 2397: Breaking that down: — the URI scheme or — the MIME type — signals that the data is Base64-encoded (omit this for plain…
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