Last updated: March 2026
What is a Text to Binary Converter?
A text to binary converter translates human-readable text into the binary code that computers use internally. Each character gets converted to its ASCII or Unicode code point, then expressed as a sequence of 0s and 1s. This tool works in both directions — paste binary code to decode it back to text.
The ASCII standard, developed in 1963, encodes 128 characters using 7 bits each. Unicode, its modern successor, encodes over 149,000 characters across 161 scripts.
It's useful for learning computer science fundamentals, debugging encoding issues, creating binary art, or understanding how computers store and transmit text data at the lowest level.
How to Convert Text to Binary
The process is simple: look up each character's ASCII code, then convert that number to binary. "Hi" becomes: H = 72 = 01001000, i = 105 = 01101001. So "Hi" in binary is 01001000 01101001.
This tool handles the conversion instantly as you type, and the character breakdown table shows the binary, hex, decimal, and octal values for every character in your input.
Key Features
Bidirectional Conversion. Type text to see binary, or paste binary to decode it back to text. Both fields update in real time.
Multiple Modes. Convert between text and binary, text and hexadecimal, or browse the complete ASCII reference table. All in one tool.
Formatting Options. Choose byte separators (space, dash, newline), bit grouping (7-bit ASCII or 8-bit standard), hex case and prefix options.
How Binary Encoding Works
Binary is base-2 — each digit is either 0 or 1. A byte (8 bits) can represent values from 0 to 255, which is enough for all basic ASCII characters. The rightmost bit represents 1, the next represents 2, then 4, 8, 16, 32, 64, 128.
Modern text uses UTF-8 encoding, which is backwards-compatible with ASCII for the first 128 characters but uses multiple bytes for international characters and emoji. A single emoji can require up to 4 bytes (32 bits) of binary data.
Frequently Asked Questions
How does binary represent text?
Each character is assigned a number (its ASCII or Unicode code point), and that number is expressed in base-2 (binary). For example, 'A' is code 65, which is 01000001 in binary. Computers store all text this way — as sequences of 0s and 1s.
What is ASCII?
ASCII (American Standard Code for Information Interchange) is a character encoding that maps 128 characters to numbers 0-127. It includes uppercase and lowercase letters, digits, punctuation, and control characters. ASCII uses 7 bits per character, though modern systems typically use 8-bit bytes.
How do you read binary?
Binary is base-2, reading right to left with place values: 1, 2, 4, 8, 16, 32, 64, 128. For 01001000: 0+64+0+0+8+0+0+0 = 72, which is 'H' in ASCII. Each group of 8 bits (a byte) represents one character.
What is the difference between ASCII and UTF-8?
ASCII uses 7 bits and covers 128 characters (basic English). UTF-8 is backward-compatible with ASCII but uses 1-4 bytes per character, supporting over 1 million characters including emoji, Chinese, Arabic, and all world languages. UTF-8 is the dominant encoding on the web today.
How many bits is a character?
In ASCII, each character uses 7 bits (stored in 8 bits/1 byte). In UTF-8, basic English characters use 8 bits (1 byte), accented characters use 16 bits (2 bytes), and many Asian characters and emoji use 24-32 bits (3-4 bytes).
What is hexadecimal?
Hexadecimal (hex) is base-16, using digits 0-9 and letters A-F. It's a compact way to represent binary: each hex digit maps to exactly 4 binary digits. So byte 01001000 = 48 in hex. Programmers prefer hex because it's more readable than binary but still maps directly to bits.