Image to Base64 (Data URI) Converter
Convert any image to a Base64 data URI — for inline CSS or HTML
Everything runs locally — the image never leaves your browser. Base64 encoding inflates size by ~33%; only inline small icons, not photos.
How it works
- 1Drop an image
Drag a file into the drop zone or click to pick — up to 10 MB.
- 2See the size impact
Base64 inflates size by ~33%. The tool shows original size, encoded size, and the overhead.
- 3Copy the format you need
Data URI on its own, CSS background-image, or a full <img> tag.
About Image to Base64 (Data URI) Converter
Free online image to Base64 converter. Drop or pick any image (PNG, JPG, SVG, GIF, WebP) to get a data URI ready to paste into CSS or HTML — with size analysis and one-click copy of the URI, a CSS declaration, or an <img> tag. Runs entirely in your browser. Image to Base64 (Data URI) Converter on 712 Tools runs entirely inside your browser using modern JavaScript APIs — no server ever sees your data. That means instant results, complete privacy, and no upload limits.
Whether you need to convert any image to a base64 data uri — for inline css or html for a debugging session, a quick sanity check, or a production incident, this tool is free to use as many times as you need. There are no watermarks, no sign-up, and no ads inside the tool itself.
Frequently asked questions
Is the image uploaded?
No. The file is read locally via FileReader — nothing leaves your browser.
When should I inline an image?
For tiny icons (under a few KB) where an extra HTTP request costs more than the size overhead. Never inline photos — the ~33% Base64 overhead kills page weight.
What about SVGs?
SVGs work fine as data URIs and are often small enough to inline. Consider URL-encoding rather than Base64 for SVG — it's actually smaller.
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