Image to Base64 Converter
Convert images to Base64 Data URL, or decode Base64 back to images. Supports drag & drop and copy.
Online Image to Base64 Converter
Convert images to Base64 Data URLs or decode Base64 strings back to images. Supports drag & drop, clipboard paste, and one-click copy. All encoding and decoding happens locally in your browser using the native FileReader API—neither your images nor Base64 strings are ever uploaded.
What Is a Data URL?
A Data URL is a scheme that embeds resources directly into a URL using Base64 encoding, in the format data:image/png;base64,xxxx. It can be used in HTML img src, CSS background, and email inline images to eliminate HTTP requests.
Common Use Cases
- Inline small icons into HTML/CSS to reduce HTTP requests and speed up page load.
- Embed images in emails where image attachments may be blocked—Base64 inline images display directly.
- Transmit image data in JSON APIs as a Base64 string field.
- Generate CSS sprite placeholders for mockups and prototypes.
File Size Considerations
Base64 encoding increases file size by approximately 33% (4/3 ratio). Therefore, it is not recommended for large images—use it only for small icons, placeholder images, and similar scenarios where avoiding an HTTP request is more valuable than the size overhead.