0️⃣1️⃣ Free Online Binary Converter
Convert text to binary code (0s and 1s) and decode binary back to text • Perfect for programmers, students, and computer science enthusiasts
📝 Input Text
0 chars, 0 bytes
0️⃣1️⃣ Binary Code
📋 Try Examples
Hello
01001000 01100101 ...
12345
00110001 00110010 ...
ASCII Art
01000001 01010011 ...
Binary Phrase
01000010 01101001 ...
🔍 Byte Details
#
Char
ASCII
Decimal
Binary
❓ How Binary Works
Binary is a base-2 number system that uses only two digits: 0 and 1. In computing, binary represents text characters using ASCII or Unicode encoding. Each character is stored as a sequence of 8 bits (1 byte).
A
01000001
B
01000010
C
01000011
a
01100001
b
01100010
c
01100011
1
00110001
2
00110010
!
00100001
✨ Key Features
100% Private
Your text never leaves your device
Instant Conversion
Real-time updates as you type
Visual Binary
See bits as colored blocks
Customizable
Bit length, spacing, prefix
Byte Details
ASCII, decimal, binary per char
Two-way Conversion
Text ↔ Binary, both directions
💡 Binary Facts
- Bit - Binary digit (0 or 1), the smallest unit of data
- Byte - 8 bits, can represent 256 different values (0-255)
- Nibble - 4 bits (half a byte), represents one hex digit
- Word - Typically 2 or 4 bytes depending on system architecture
- ASCII - Uses 7 or 8 bits to represent English characters
- UTF-8 - Variable-length encoding (1-4 bytes per character)
❓ Frequently Asked Questions
How do I read binary code? ▼
Binary is read from right to left, with each bit representing a power of 2. For example, 01000001 (binary) = 1×2^6 + 1×2^0 = 64 + 1 = 65 (decimal), which is ASCII code for 'A'. Each group of 8 bits represents one character.
What's the difference between ASCII and UTF-8? ▼
ASCII uses 7 or 8 bits per character and only supports English letters, numbers, and basic symbols. UTF-8 is variable-length (1-4 bytes) and supports all Unicode characters, including emojis and international scripts, while remaining backward compatible with ASCII.
Why is 8 bits per byte standard? ▼
8 bits became standard because it's a power of 2 (2^8 = 256), which can represent all English characters, numbers, and common symbols. It also aligns well with hexadecimal representation (each hex digit is 4 bits).
Can I convert emojis to binary? ▼
Yes! Emojis are Unicode characters and typically require more than 8 bits (usually 16 or 32 bits). Using the 16-bit or 32-bit option in this converter will properly handle emojis and other Unicode characters.
Is my text stored or saved? ▼
No! All processing happens in your browser. Your text never leaves your device. We cannot see, store, or access your content. Your privacy is 100% protected.