ASCII only supports characters 0-127 (English letters, digits, symbols), 1 byte per character. UTF-8 is compatible with ASCII and supports multi-language characters like Chinese, using 1-4 bytes per character. Choose UTF-8 for non-English text.
Binary input can be separated by spaces, commas, or newlines per character code, or entered continuously (select "None" separator). For example: "01001000 01100101" or "0100100001100101".
Yes, absolutely. All conversion happens locally in your browser. No text is ever uploaded to any server.