Image to Base64

Image to Base64 is a browser-based tool that converts image files into Base64-encoded data URIs. Instead of referencing an external image file via a URL, a data URI encodes the entire image as a text string that can be embedded directly into your HTML, CSS, or JavaScript code. This eliminates the need for a separate HTTP request to fetch the image asset.

For developers, this is especially useful when building self-contained components, email templates, or offline-capable web pages where external file references are impractical or unreliable. Base64 encoding is supported natively by all modern browsers, making it a well-established technique for inlining small icons, logos, backgrounds, and other lightweight image assets without any additional tooling or build steps.

Using the tool is straightforward: upload an image file — PNG, JPG, GIF, SVG, or WebP are all supported — and the tool immediately generates the corresponding Base64 data URI string. The output follows the standard format: data:[mime-type];base64,[encoded-string]. You can copy the full data URI and drop it directly into an <img> tag's src attribute, a CSS background-image property, or anywhere else an image URL is expected.

The output field gives you both the raw Base64 string and the complete data URI ready to paste. For use in HTML, the full URI is what you need. For certain contexts like JSON payloads or custom protocols, you may only want the raw Base64 portion without the data:image/png;base64, prefix — both are available.

Keep in mind that Base64 encoding increases the file size of the image by approximately 33% compared to the original binary. This makes the technique best suited for small assets such as icons, favicons, and simple illustrations. Inlining large images will bloat your HTML or CSS files and can negatively impact page load performance, so it's recommended to keep Base64-encoded images under 10–20 KB when possible.