Binary to Text Converter
ASCII/UTF-8 Decoder
Decode binary code into readable text instantly. Convert 8-bit binary sequences into ASCII or UTF-8 characters — perfect for decoding secret messages, analyzing network data, or learning character encoding.
5Number Systems
∞Precision
0msLatency
Interactive Tool Module
The ASCII Character Mapping Array
Binary does not natively have an alphabet—it only has numbers. To make text, computers use an index called ASCII. Hover over the text block below to reveal the hidden 8-bit binary indices stored in RAM for each letter!
Hover over a green block to probe memory
Memory Pointer Value (Decoded)
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FAQ
Frequently Asked Questions
How do you convert binary to text?
Split the binary string into groups of 8 bits (bytes). Convert each byte to its decimal value, then look up the corresponding ASCII character. Example: 01001000 01101001₂ → 72 105₁₀ → 'Hi'. Each 8-bit group maps to exactly one ASCII character for values 0-127.
What is ASCII?
ASCII (American Standard Code for Information Interchange) is a character encoding standard that maps 128 characters to numbers 0-127. It includes uppercase letters (65-90), lowercase letters (97-122), digits 0-9 (48-57), punctuation, and control characters. Each ASCII character fits in 7 bits, though it's typically stored in 8 bits (one byte).
What is the binary code for the letter A?
The uppercase letter 'A' is ASCII code 65, which in binary is 01000001₂. Lowercase 'a' is ASCII code 97, or 01100001₂. The difference between uppercase and lowercase letters in ASCII is always 32 (bit 5 is flipped: 0 for uppercase, 1 for lowercase).
What is the difference between ASCII and UTF-8?
ASCII uses 7 bits to encode 128 characters (English letters, digits, symbols). UTF-8 is a variable-width encoding that uses 1-4 bytes per character and can represent over 1.1 million Unicode characters (including emoji, Chinese, Arabic, etc.). UTF-8 is backward-compatible with ASCII — the first 128 UTF-8 characters are identical to ASCII.
Can binary represent any text character?
Yes, using Unicode encoding (UTF-8/UTF-16/UTF-32). ASCII covers 128 basic characters. UTF-8 extends this to over 1.1 million characters including all world languages, symbols, and emoji. UTF-8 uses 1 byte for ASCII, 2 bytes for Latin/Greek/Cyrillic, 3 bytes for most Asian characters, and 4 bytes for emoji and rare characters.
How do computers store text as binary?
Computers store text by assigning each character a numeric code (e.g., ASCII or Unicode), then storing that code in binary. When you type 'Hello', the computer stores: 01001000 01100101 01101100 01101100 01101111₂. Text files are simply sequences of these binary character codes, plus encoding metadata.