Text to Binary Converter 01

Computers do not store letters; they store numbers. Every character on your keyboard is assigned a numeric code point by a character set. The oldest and most fundamental of these is ASCII, which maps 128 characters to the numbers 0 through 127. The capital letter A is code 65, lowercase a is 97, and the digit 0 is 48. This converter takes each character, looks up its code, and writes that number in the base you choose.

To turn a code into binary, the number is expressed as a sum of powers of two and padded to a full byte: eight bits. That is why every character above appears as an eight-digit group like 01000001. Reading right to left, the bit positions are worth 1, 2, 4, 8, 16, 32, 64, and 128; adding the positions that hold a 1 reconstructs the original code. For A that is 64 + 1 = 65. Because every byte is exactly eight bits, you can decode binary back to text simply by slicing the stream into groups of eight, which is exactly what this tool does when you paste binary without spaces.

Characters beyond the basic English set (accented letters, symbols, emoji) need more than one byte. UTF-8, the encoding of the modern web, keeps the original ASCII bytes unchanged but uses two to four bytes for everything else. That is why an emoji produces far more than eight bits. The order in which multi-byte values are stored is called endianness: big-endian writes the most significant byte first, little-endian writes it last. UTF-8 sidesteps the ambiguity by defining a fixed byte order, but you will meet endianness again the moment you work with raw integers or file formats.