Text to Binary Converter
Every character on your keyboard is assigned a numeric code by the ASCII (American Standard Code for Information Interchange) standard — for example, the letter 'A' is 65, 'a' is 97, and the space character is 32. This converter takes any text you type and represents each character as an 8-bit binary number (a sequence of eight 0s and 1s), showing exactly how computers store plain text at the lowest level.
The reverse operation — binary to text — reads each 8-bit group, converts it back to its decimal ASCII value, and looks up the corresponding character. This tool is useful for understanding encoding fundamentals, debugging data streams, or completing computer science assignments that involve binary representation.
How it works
For each character: decimal = ASCII code point; binary = decimal expressed in base-2, zero-padded to 8 bits. Example: 'H' → 72 → 01001000. Reverse: 01001000 → 72 → 'H'.
Use cases
- Learning how computers represent text in binary
- Debugging binary data streams and network protocols
- Completing computer science homework on ASCII encoding
- Converting secret messages to binary for puzzles or games
- Verifying byte values when working with low-level file formats
Frequently asked questions
How do you convert text to binary?
Each character is first mapped to its ASCII code point, then that number is written in base-2 and zero-padded to 8 bits. For example, the letter H has the ASCII value 72, which becomes 01001000 in binary. This tool performs the lookup and conversion for every character automatically.
What is the binary code for the letter A?
The uppercase letter A has the ASCII value 65, which is 01000001 in 8-bit binary. The lowercase a has the value 97, or 01100001. The difference of 32 between uppercase and lowercase letters holds throughout the ASCII alphabet.
How do I convert binary back to text?
Split the binary string into groups of 8 bits, convert each group from base-2 to its decimal value, then look up the matching ASCII character. For instance, 01001000 equals 72, which is the letter H. This converter does the reverse decoding instantly when you paste binary in.
Why is each character 8 bits long?
Standard ASCII uses 7 bits to represent 128 characters, but bytes are 8 bits, so an extra leading zero is added for alignment. Storing each character as one full byte (8 bits) is how computers keep text at the lowest level. Extended encodings like UTF-8 may use additional bytes for characters beyond basic ASCII.
What is the difference between ASCII and binary?
ASCII is a character set that assigns a number to each letter, digit, and symbol, while binary is simply the base-2 representation of those numbers. In other words, ASCII decides that H equals 72, and binary expresses 72 as 01001000. This tool shows both the decimal ASCII code and the binary for each character.