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Turn an image into a Base64 data URI for inline embedding.
🔒 100% client-side — read via FileReader.readAsDataURL. Your image never leaves your device.
A data URIembeds a file's contents directly inside a URL string, prefixed with data:image/png;base64,…. Inlining an image as a data URI means the browser does not make a separate HTTP request to fetch it — useful for tiny icons, email assets, and self-contained HTML/CSS demos. This tool converts any image you upload into a Base64 data URI ready to paste into HTML, CSS, or JSON.
Base64 encoding inflates file size by roughly 33%, and a large data URI blocks the parser from rendering the page until it is decoded. For anything over a few kilobytes — hero photos, product images, videos — serve a real file with proper caching instead. Also, data URIs cannot be cached independently: if the same image appears on 50 pages, each page carries its own copy.
The conversion uses FileReader.readAsDataURL(), which reads the file into memory in your browser and produces the Base64 string locally. Your image is never uploaded to a server — which matters for private or sensitive assets, and also means the tool works offline once the page is loaded. Three output formats are provided: the raw data URI, a ready-to-paste <img> tag, and a CSS background-image declaration.
The Image to Base64 Converter converts image to base64from one unit to another using the exact internationally defined conversion factors. Type a value, choose your source and target units, and the converted result is shown instantly — no waiting, no page reload.
Manual conversion is error-prone because it means memorizing ratios (how many feet in a meter, how many pints in a liter). This tool removes that friction: the conversion factor is built in, and the math is done to full precision with no rounding until the final displayed number.
Common uses: people reach for this tool when they need to look up a image to base64 data uri converter, png to base64 online no upload, convert jpg to base64 string, or base64 image for css background.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
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