Upload an Image
Drag & drop or click to browse
Supports: PNG, JPG, GIF, SVG, WebP, ICO
Convert images to Base64 strings instantly. Upload PNG, JPG, GIF, SVG, WebP, or ICO files and get data URIs, CSS backgrounds, and HTML img tags -- all processed in your browser.
Upload any supported image and instantly get Base64 encoded output. All processing happens in your browser using the FileReader API -- no server uploads required.
Get output in multiple formats: raw Base64 string, data URI for direct embedding, CSS background-image rule, and HTML img tag -- ready to paste into your code.
Supports PNG, JPG/JPEG, GIF, SVG, WebP, and ICO formats. Perfect for icons, logos, small graphics, and any images you want to embed directly in your HTML or CSS.
Your images are processed entirely client-side in your browser. No uploads, no server storage, no logging. Complete privacy and security for sensitive images.
Base64 encoding converts binary image data into ASCII text strings, allowing images to be embedded directly in HTML, CSS, or JSON without requiring separate image files. This is particularly useful for small images like icons, logos, and UI elements where reducing HTTP requests improves performance, or in environments like email templates where external files aren't permitted.
Base64 encoding takes binary data and represents it using 64 ASCII characters (A-Z, a-z, 0-9, +, /). Every 3 bytes of binary data becomes 4 bytes of Base64 text, resulting in approximately 33% size increase. While this seems inefficient, it's offset by the elimination of HTTP requests and the ability to bundle images with your code.
Base64 encoding is ideal for small images (under 10KB) that are frequently used, such as icons, buttons, logos, and decorative elements. It's perfect for email templates where external resources may be blocked, data URIs in SVGs, single-page applications where bundling assets is important, and situations where you want to reduce the number of HTTP requests to improve initial page load time.
Avoid Base64 for large images as the 33% size increase becomes significant. Don't use it for photos or high-resolution graphics. Base64 images can't be cached separately by browsers, so reusing the same image across multiple pages means duplicating the Base64 string. For images used across many pages, traditional image files with proper caching are more efficient.
data:image/png;base64,... This allows images to be included without separate HTTP requests.
background-image rule with the Base64 data URI. This is useful for embedding small icons, logos, or decorative images directly in your stylesheets.
Check out our other free encoding and conversion tools -- all running in your browser with no sign-up required.
Base64 Encoder/Decoder →