Free Image to Base64 Converter

Drop an image to get its Base64 string, data URI, and ready-to-paste CSS and HTML snippets — nothing is uploaded.

Drop an image here, or click to browse

PNG, JPEG, WebP, GIF, or SVG · up to 4 MB · never uploaded

How to use / FAQ

Drop or pick an image and you get four copy-ready outputs at once: the raw Base64 string, the full data URI, a CSS background-image rule, and an HTML img tag. The conversion is a straight read of the file's bytes — the image is never re-encoded, resized, or uploaded.

What is a Base64 image, and when should I use one?

It's the image's bytes written out as text, which lets you paste the image directly into a CSS file, HTML page, JSON payload, or email template instead of linking to a separate file. It shines for small assets — icons, logos, tiny backgrounds — where saving an extra network request matters more than file size.

When is Base64 the wrong choice?

For anything big or reused across pages. Base64 makes the data about 33% larger, can't be cached separately from the page, and bloats the HTML or CSS it lives in. A photo belongs in a normal file with a URL; if yours is large, compress it first with the Image Compressor. If the file is simply too heavy, shrink it first with the image compressor.

What's the difference between the Base64 string and the data URI?

The data URI is the Base64 string with a small header on the front (like data:image/png;base64,) that tells the browser what the data is. Browsers, CSS, and img tags need the full data URI; APIs and code that already know the format usually want just the raw string. To encode or decode plain text instead, use the Base64 encoder / decoder.

Why is there a 4 MB limit?

Four megabytes of image becomes over five megabytes of text, and a string that size is slow to render, copy, and paste — and far past the point where embedding makes sense. The limit keeps the tool responsive; larger images are better compressed first or linked as files.

Is my image uploaded anywhere?

No. The file is read directly by your browser with the FileReader API and converted on your device. Nothing is sent to a server, so it's safe for logos, mockups, and internal screenshots.