Text to Binary Converter

What is binary code?

Binary is a number system that uses only two digits: 0 and 1. In computing, a single binary digit is called a bit. Eight bits make a byte, which can represent values from 0 to 255. Text you see on a screen is stored as numbers inside the computer; standards like ASCII map letters, digits, and symbols to those numbers. When we say we are converting “text to binary,” we are really showing the bits that encode each character according to a character encoding.

How does text to binary conversion work?

Modern tools typically use UTF-8, which is backward compatible with ASCII for basic English text. Each character becomes one or more bytes. For example, uppercase “A” (ASCII 65) is one byte: 01000001. Characters outside the ASCII range may use two, three, or four bytes in UTF-8. This converter displays every byte as an 8-bit binary group, separated by spaces, so you can read the encoding clearly.

How to convert text to binary manually

1. Look up each character’s byte value in ASCII (for simple English) or use UTF-8 rules for other scripts.
2. Convert that decimal value to an 8-bit binary number (pad with leading zeros if needed).
3. Write each byte’s bits as a group, usually separated by spaces.

Worked example: the word “Hi”.

• “H” is ASCII 72. In binary: 01001000.
• “i” is ASCII 105. In binary: 01101001.

So Hi = 01001000 01101001.

Common text-to-binary mistakes

• Wrong number of bits — each byte must be exactly eight bits; missing leading zeros changes the value.
• Mixing up ASCII codes — uppercase and lowercase letters have different values (e.g. “A” vs “a”).
• Ignoring UTF-8 for non-ASCII text — emojis and accented letters use multiple bytes; one character is not always one byte.
• Treating spaces or punctuation as “nothing” — spaces and symbols still encode to bytes and belong in the binary output if you want a faithful conversion.

Frequently Asked Questions