Base64 encoding converts binary data into a text format using only readable ASCII characters, commonly used for embedding images in HTML/CSS, encoding email attachments, or passing complex data through systems that only support plain text. This Base64 encoder and decoder instantly converts plain text into Base64-encoded output, or decodes Base64 strings back into their original readable text. It's a handy tool for web developers working with data URIs, API tokens, or configuration files, as well as anyone needing to quickly inspect or decode Base64-encoded content they've encountered. Simply paste your text or encoded string and switch between encode and decode modes for instant results.