Converting PNG to Base64 changes the PNG image data into a text-based Base64 representation. Developers can then use the encoded data in places such as HTML, CSS, JSON, or application code. This can be useful for small icons and graphics that need to be embedded directly rather than loaded as separate image files. However, Base64 encoding increases the amount of data compared with the original binary image, so it is generally more practical for smaller PNG files rather than large images.