About this tool
Base64 turns any binary data into plain ASCII text using 64 characters — the standard trick for embedding images in CSS, attachments in email (MIME), or binary blobs in JSON. This tool converts both directions live as you type, handling Unicode correctly by encoding through UTF-8 (many older tools corrupt accents and emoji).
The file zone converts any file into a data: URI ready to paste into CSS or HTML — with a live preview for images. Everything happens on your machine: no upload, no size tracking, works offline after first load. More free tools at dec0de.dev, and the full story in What is Base64?