Image to Base64 Converter - Encode Images as Data URIs

What Image to Base64 Does

This tool reads your file with the browser's FileReader API and returns it as a data URI: the string `data:image/png;base64,` followed by the file's bytes rewritten in Base64. Base64 is a transport encoding, not a compression scheme. It maps every 3 bytes of binary onto 4 ASCII characters drawn from A-Z, a-z, 0-9, plus and slash, which means the encoded form is always about 33% larger than the file you started with. Nothing about the image itself changes — the pixels, the format, the color profile, and any EXIF metadata all survive untouched, and decoding the string gives you back a byte-identical file. What you gain is a representation made entirely of characters that are safe to paste into source code, which is why data URIs work anywhere a URL is expected: an img src, a CSS url(), a Markdown image, a JSON field. The tool builds those four snippets for you and copies the complete string even when the on-screen preview is truncated, because a data URI for a modest image runs to tens of thousands of characters and rendering all of them would stall the page. Alongside each file it shows the original size, the encoded size, and the overhead percentage, so the cost of inlining is visible before you commit to it. Reading happens entirely on your device; no file is uploaded, and the page keeps working with the network disconnected.