Binary to Text Converter

About the Tool

From characters to bits

Computers do not store letters - they store numbers, and those numbers are written in binary, a base-2 system using only 0 and 1. Every character you type maps to a numeric code point, and that code point is written out as a string of bits. Group the bits into bytes (eight bits each) and you have the binary representation that this converter produces and reads back.

ASCII and UTF-8

The original ASCII standard covers the English alphabet, digits and common punctuation in a single byte, with values from 0 to 127. Modern text uses UTF-8, which keeps those same single-byte values for ASCII characters but expands to two, three or four bytes for everything else - accented vowels, currency symbols and emoji. That is why a plain "A" becomes one byte while a character like "é" becomes two.

A worked example

Take the word "Hi". Each letter has an ASCII code, and each code is written as an eight-bit byte:

H  = 72  = 01001000
i  = 105 = 01101001
"Hi"     = 01001000 01101001

Each byte is shown with a space before the next, which is the convention this tool follows so the output stays readable rather than turning into one unbroken wall of digits.

Decoding the other way

To go from binary back to text, the converter splits the input into eight-bit chunks, reads each chunk as a number, and looks that number up in the character set. If your binary is not a clean multiple of eight bits the decode will fail, so keep your bytes spaced and complete when you paste them in.

Where it is genuinely useful

Beyond being a teaching aid for data-representation and computer-architecture courses, it is handy for sanity-checking encodings while debugging low-level protocols and embedded systems, or for solving capture-the-flag puzzles where a message has been hidden as a long binary string.