Image to Base64

An image to Base64 encoder converts a binary image file into a Base64 text string, wrapped as a data URI you can paste directly into HTML, CSS, JSON, or SVG. A data URI looks like data:image/png;base64,iVBORw0KGgo... where the MIME type tells the browser how to decode the text that follows. This tool reads the file in your browser and produces the complete data URI, including the correct MIME prefix, so you can drop it straight into a src attribute or a CSS background-image. Encoding an image inline removes a separate network request, which can speed up the first paint of small, critical assets like icons, a logo, or a placeholder image. The important trade-off is size: Base64 encoding inflates the data by roughly 33% because it represents three bytes of binary as four text characters. That overhead is fine for a 2 KB icon but wasteful for a 500 KB photo, where a normal linked file plus browser caching is faster. Another gotcha is caching: an inlined image cannot be cached separately by the browser, so if the same image appears on many pages, an external file is usually the better choice. Base64 also makes the surrounding HTML or CSS harder to read and bloats the file it lives in. Good uses include tiny UI sprites, email-safe inline images, embedding an image in a single self-contained HTML file, or storing a small image inside a JSON payload or database field. Because the encoding runs entirely in your browser, the image is never uploaded, and the tool works offline once loaded.