Encode or decode text. URL-safe variant, line wrap, data URI.
Input: 58 B → output: 80 characters
Everything is calculated locally in your browser. Nothing is sent to a server, nothing is stored.
Base64 turns any data into text made of 64 safe characters (A–Z, a–z, 0–9, + and /). It is not encryption: anyone can decode it back.
Use it when data has to pass through a channel that only accepts text: JSON, an HTTP header, an e-mail, or a data URI in CSS and HTML. The URL-safe variant replaces + and / with - and _ and drops the trailing =, so it can go into an address.
Choose Encode or Decode and paste your text; the result is computed as you type. Line wrap breaks the output after 76 characters. When decoding you can paste a whole data URI, the tool strips the prefix. Swap moves the output into the input and flips the direction.