Image to Base64 Converter encodes any image file (PNG, JPG, SVG, WebP, GIF) into a Base64 data URL string that can be embedded directly in HTML img src attributes, CSS background-image properties, API request bodies, and HTML email templates. No server required — your image never leaves your browser.
The tool reads your image file using the browser FileReader API (readAsDataURL), which converts the binary image data into a Base64-encoded string prefixed with the MIME type. The full data URL format is: data:[mimetype];base64,[base64string]. This is the format recognized by all modern browsers, SVG renderers, and most email clients.
Yes. Base64 encoding increases file size by approximately 33% because it encodes every 3 bytes as 4 ASCII characters. Use only for small images (icons, thumbnails under 10KB) to avoid performance issues.
PNG, JPG/JPEG, GIF, SVG, WebP, BMP, and ICO. The tool detects the file type and includes the correct MIME type in the data URL prefix.
No. Conversion runs entirely in your browser using the FileReader API. Your image is never uploaded to any server.
Yes. React Native Image component accepts data URLs in the source prop: <Image source={{ uri: 'data:image/png;base64,...' }} />
As background-image: background-image: url('data:image/png;base64,...'); This works in all modern browsers.
Yes, completely free. No login, no limits.
Tool workspace
Free image to Base64 converter online — upload PNG, JPG, SVG, WebP and get a Base64 data URL instantly. Embed inline images in HTML, CSS, and emails. No server upload, 100% private.
Input
upload logo.png
Output
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...
