Binary to Text Converter

Computers store everything — text, images, your browser, this very sentence you are reading — as binary: sequences of 1s and 0s, where each individual 1 or 0 is a bit, the smallest unit of digital information. A group of 8 bits is a byte, and bytes are the building block of all modern computing. The letter A, stored in your computer's memory right now as you read this, is the byte 01000001 — that exact sequence of eight bits has represented the capital letter A since the ASCII standard was published in 1963. The lowercase a is 01100001 — only one bit different from its uppercase sibling. This tool lets you see the binary behind any piece of text and reverse the process, converting a binary string back into the characters it represents.\n\nThere are two common ways to convert text to binary, and the difference matters. The first encodes each character independently using its Unicode code point as an 8-bit, 16-bit, or variable-width value. The second encodes the text as UTF-8 bytes — a variable-length encoding where ASCII characters take 1 byte each, European accented characters take 2 bytes, and CJK characters and emoji take 3 or 4 bytes. This tool uses the UTF-8 approach because it is the real-world format: the web, JSON, and almost every modern system uses UTF-8 to transmit and store text. When you type Hello, the tool shows 5 bytes of binary (one per ASCII character). When you type café, it shows 5 bytes for the ASCII letters plus 2 bytes for the accented e (which is 11000011 10101001 in UTF-8). When you type an emoji, it shows all 4 bytes of its UTF-8 encoding.\n\nOn the decode side, the tool accepts binary with or without spaces — 01001000 01101001 and 0100100001101001 both decode to Hi — as long as the number of bits is a multiple of 8. It handles the case where someone pastes binary with spaces, tabs, newlines, or other whitespace between bytes (all are stripped before parsing), and it detects when the input is not valid binary (contains characters other than 0, 1, and whitespace) and shows a clear error message. This tool is excellent for learning how character encoding works at the binary level — it makes the abstract concept of bytes and bits visible and interactive.