Binary to Text Converter

How to Convert Binary to Text

Decoding binary back into readable text reverses the encoding process. The important part is knowing where each character starts and ends, because a long run of ones and zeros carries no visible boundaries on its own.

1. Split the binary string into groups of eight digits, working from the left. Each group is one byte and one character.
2. Convert each eight digit group into a decimal number by adding the place values 128, 64, 32, 16, 8, 4, 2, and 1 wherever a bit is 1.
3. Look up that decimal number in an ASCII table to find the character it represents.
4. Write the characters out in the same order as the groups to rebuild the original text.

Worked example: decoding 01001000 01101001

01001000 01101001 = "Hi"

Reading a Byte by Place Value

Each position in a byte has a fixed weight. From left to right those weights are 128, 64, 32, 16, 8, 4, 2, and 1. To decode a byte you add up the weights wherever the bit is set to 1 and ignore the positions holding 0.

Take 01001000. The 1 bits sit in the 64 and the 8 positions, so the value is 64 plus 8, which is 72. Character 72 in ASCII is the capital letter H. Every byte in a binary string decodes the same way.

ASCII, Unicode, and UTF-8

ASCII is the original character encoding standard, finalised in 1963. It defines 128 characters: the English alphabet in both cases, the digits 0 to 9, common punctuation, and 33 non printing control codes such as tab, newline, and carriage return. Because 128 values fit in seven bits, every ASCII character fits comfortably inside a single byte.

ASCII covers English and almost nothing else, which is why Unicode exists. Unicode assigns a number, called a code point, to every character in every writing system, plus symbols and emoji. UTF-8 is the encoding that turns those code points into bytes, and it was designed so that the first 128 code points encode to exactly the same single bytes as ASCII. That backward compatibility is why plain English text looks identical in both.

The practical consequence for this tool: English letters, digits, and punctuation each produce one byte. Accented characters, Greek, Cyrillic, Arabic, and CJK characters produce two or three bytes each, and emoji usually produce four. The converter handles all of them correctly using UTF-8.

Common Decoding Errors

• If the total number of bits is not a multiple of eight, the string is incomplete or was grouped differently, and the tail will decode into nonsense.
• Binary that was written without leading zeros cannot be split reliably, because a seven digit character looks identical to part of the next byte.
• Values above 127 are not standard ASCII. They may be part of a multi byte UTF-8 sequence, which needs several bytes decoded together rather than one at a time.

ASCII Conversion Table

Every printable ASCII character with its decimal code, binary byte, and hexadecimal byte. Codes 0 to 31 are control characters and are not printable, so they are not listed here.

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