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PNG, JPG, GIF, WEBP, SVG — max 8MB
Convert any image to a Base64 data URI instantly — drag, drop, and copy. Perfect for embedding images directly in HTML, CSS, or JSON.
PNG, JPG, GIF, WEBP, SVG — max 8MB
A Base64 data URI represents an image's binary data as text, prefixed with a MIME declaration like data:image/png;base64,, so it can be embedded directly in HTML or CSS without a separate file.
It lets you embed small images directly into HTML, CSS, or JSON without an extra file request — useful for icons, email templates, and self-contained documents.
Yes, roughly 33% bigger than the original binary file, since text characters represent binary data less compactly than raw bytes.
No. All conversion happens locally in your browser using the FileReader API — your image never leaves your device.
This tool converts any image file directly into a Base64-encoded data URI, ready to paste into HTML, CSS, or JSON. Unlike general-purpose file-to-Base64 tools, this one is built specifically around image workflows — showing a live preview of your uploaded image alongside the encoded output, plus size statistics and multiple copy formats tailored to common use cases like CSS backgrounds and HTML img tags.
A data URI is a way of embedding a file's actual content directly inside a URL string, instead of pointing to a separate file location. For images, this looks like data:image/png;base64,iVBORw0KGgo... — the part before the comma declares the MIME type and encoding, and everything after the comma is the image's binary data represented as Base64 text. Browsers can render this string exactly as if it were a normal image source, without making any additional network request.
Base64 encoding isn't always the right choice. Because it increases file size by roughly a third, and because data URIs can't be cached independently by the browser the way a normal image file can, embedding large or frequently-reused images as Base64 usually hurts performance rather than helping it. It works best for small, one-off graphics — icons, small logos, tiny UI decorations — rather than photos, hero images, or any image reused across many pages.
When you upload an image, the browser's built-in FileReader API reads the file and converts it to a Base64-encoded data URI entirely on your device — no upload to any server happens. The tool then displays a live preview of the image so you can visually confirm you selected the right file, along with the original file size, the encoded size, and the percentage overhead from encoding. You can copy the full data URI (ready to paste directly into an <img src=""> attribute), the raw Base64 string without the data URI prefix, a ready-made CSS background-image declaration, or a complete HTML <img> tag.
This tool works with any image format your browser can read, including PNG, JPG/JPEG, GIF, WEBP, BMP, and SVG. The output MIME type is automatically detected from the uploaded file, so the data URI prefix always matches the actual image format — a PNG produces data:image/png;base64,, a JPG produces data:image/jpeg;base64,, and so on.
Your image is processed entirely in your browser using the FileReader API — it is never uploaded, transmitted, or stored on any server. This makes the tool safe to use even for private, unpublished, or sensitive images.
This tool gives you four ready-to-use output formats so you don't have to manually assemble the final code. The full data URI is the complete string, ready for direct use anywhere a URL is expected. The raw Base64 (no prefix) option strips the data:image/...;base64, header, useful when a system expects just the encoded bytes on their own — for example, some JSON API fields or database columns. The CSS background option wraps the data URI in a ready-to-paste background-image declaration. The HTML img tag option produces a complete, valid <img> element with the data URI as its source and the original filename as alt text, ready to drop straight into a page.