Binary to Text Converter

ASCII covers 128 characters: the English alphabet, digits, and standard punctuation. Every ASCII character fits in 7 bits (0–127). UTF-8 is a superset that encodes over a million characters including accented letters, CJK characters, Arabic, emoji, and more — using 1 to 4 bytes per character. For plain English text, both produce the same result. For international text or symbols, switch to UTF-8.

The most common cause is a character that is not 0 or 1. Check for spaces in wrong places, letters, or incomplete groups. Each binary group should be exactly 8 bits (or 7 for 7-bit mode). If you got binary from somewhere else, make sure the separator setting matches how the groups are separated.

The separator controls how binary groups are split in the output (text → binary) and how they are expected in the input (binary → text). Space is the most readable: 01001000 01100101. None produces a long continuous string: 0100100001100101. Comma and dash are useful when integrating with systems that use those delimiters.

8-bit (one byte) is the standard grouping — each character maps to 8 binary digits. 7-bit mode uses 7 digits per character, which covers the original ASCII range (0–127). Most use cases should stick with 8-bit. Use 7-bit only when working with legacy systems or protocols that specifically use 7-bit ASCII.

Yes, with UTF-8 encoding selected. UTF-8 encodes non-ASCII characters using multiple bytes, so emoji and international characters produce longer binary sequences. For example, the emoji ☺ encodes to 3 bytes (24 binary digits). Make sure the encoding is set to UTF-8 before converting.

Type a word, click "Text → Binary", and examine how each letter maps to a number. The letter H is 72 in decimal, which is 01001000 in binary. Try typing the alphabet and see the pattern. Switching between ASCII and UTF-8 for the same text shows why encoding matters in computing.

No. All encoding and decoding happens locally in your browser using JavaScript. Your text and binary data are never transmitted to any server or stored anywhere.