Base64 encoder & decoder
Paste any text and convert it to Base64, or paste a Base64 string and get the original text back. Accented characters and emoji are handled correctly (UTF-8).
What is Base64 encoding used for?
Base64 turns any sequence of bytes into text made up only of letters, digits,
+, / and =. You'll run into it everywhere: images embedded
in CSS and emails (data URIs), the Authorization: Basic header in HTTP requests,
and the first two parts of a JWT. Keep in mind it is not encryption — anyone can decode
it. Its only job is to carry binary data through channels that accept plain text.
Why UTF-8 support matters
The browser's built-in btoa() function fails on its own with accented letters,
symbols like "€" and emoji, because it only accepts 8-bit characters. This tool first converts
your text to UTF-8 bytes with TextEncoder, so strings like "café" and "🙂" encode
and decode without errors — producing the exact same output you would get in Python or Node.js.