Base64 Image Encoder: Turn Images Into Text
Online Base64 image tool: encode an image into a data URI (data:image/...;base64,) for direct inlining in HTML / CSS, and decode it back to a preview.
An image is binary, while CSS backgrounds and many API fields accept only text. Encoding an image to Base64 produces a string starting with data:image/png;base64, that you can drop straight into an <img src> or CSS rule, saving an extra network request.
It suits small icons and placeholder images. For large images the ~33% size increase will slow the page down, so a regular image file with caching is the better choice.
The tool also works in reverse: paste a data URI to decode it back into an image preview so you can verify the content.