Free Image to Base64 Encoder Online

Image to Base64 Encoder converts image files into a Base64 data URI string that you can embed directly in HTML, CSS, or JavaScript. A data URI embeds the image content inline as text: `data:image/png;base64,iVBOR...`. The browser decodes this and renders the image without making a separate HTTP request. This is useful for small images like icons and logos that you want to inline directly in code — particularly in single-file HTML documents, email templates, or CSS backgrounds.

The image file is read using the FileReader API, which produces an ArrayBuffer of the raw bytes. This is converted to a Base64 string (using btoa() on the binary data), and prepended with the MIME type and base64 prefix to form the complete data URI: `data:${mimeType};base64,${base64String}`.