Base64 Image Encoding: When to Use It and How to Convert

Base64 encoding lets you embed images directly in HTML, CSS, and emails. Learn when it makes sense, when it does not, and how to convert.

Base64 encoding converts binary image data into a text string that can be embedded directly in code. Instead of referencing an external image file, you paste the entire image as a text string inside your HTML, CSS, or email template.

This is a niche technique with specific use cases. It is not a replacement for regular image files. But when you need it, it is incredibly useful.

Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A-Z, a-z, 0-9, +, /). An image file that is normally a sequence of bytes gets converted into a long text string.