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Binary Code Examples

A quick reference of how common words and letters look in binary — plus a live converter to try your own.

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Type any word to see it in binary, byte by byte.
Binary alphabet

Letters in binary.

Every letter is one byte. Here are some of the most common ones.

LetterBinary
A01000001
B01000010
C01000011
D01000100
E01000101
H01001000
L01001100
O01001111
S01010011

See the ASCII Table for the full set →

Words in binary

Common words and their bytes.

A handful of words you'll see in puzzles, demos and tutorials.

WordBinary
Hello01001000 01100101 01101100 01101100 01101111
Hi01001000 01101001
SOS01010011 01001111 01010011
Love01001100 01101111 01110110 01100101
Help01001000 01100101 01101100 01110000
World01010111 01101111 01110010 01101100 01100100
Numbers in binary

Digit characters and their bytes.

Each digit character (not the numeric value) is encoded as one ASCII byte.

NumberBinary
000110000
100110001
200110010
900111001
1000110001 00110000
12300110001 00110010 00110011
Related conversions

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Reference

ASCII Table

Every ASCII character with decimal, hex & binary.

Open tool →
FAQ

Binary code examples, explained.

Why are letters 8 bits in binary?
ASCII defines 128 characters using 7 bits, but bytes are 8 bits wide on modern computers, so each letter is stored in one byte with the top bit set to 0. That makes one byte per character and aligns with UTF-8.
Why are digits 48–57 in ASCII?
ASCII was designed so that the digit characters 0–9 sit at code points 48–57, in the same order as their numeric values. That lets a program convert a digit character to its number by subtracting 48 (or by masking off the upper bits, since 48 is 00110000 in binary).
How do I write my own text in binary?
Type your text into the converter on this page and the binary appears instantly. Each character becomes an 8-bit byte; copy the result and paste it anywhere. Spaces between bytes are just for readability.