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How to Convert Text to Binary Online Free — Binary, Hex, Octal

Convert text to binary, hexadecimal, octal, and decimal representations online for free. Also convert binary back to text.

4 min read

·21 May 2026·Updated: 24 May 2026·By Helperzy Team

Text to binary conversion shows how computers represent text internally. Every character you type is stored as a number, and that number can be expressed in different bases — binary (base-2), hexadecimal (base-16), octal (base-8), or decimal (base-10). Understanding these conversions is fundamental to computer science and programming.

Number Systems Explained

Binary (base-2): Uses only 0 and 1. This is how computers actually store data — as sequences of on/off electrical signals. 'A' = 01000001. Hexadecimal (base-16): Uses 0-9 and A-F. A compact way to represent binary data. Every 4 binary digits = 1 hex digit. 'A' = 41. Octal (base-8): Uses 0-7. Historically used in Unix systems for file permissions. 'A' = 101. Decimal (base-10): The number system humans use daily. Shows the ASCII/Unicode code point. 'A' = 65.

Common Uses

Education: Learning how computers represent text. Understanding ASCII encoding and character sets. Programming: Working with binary data, hex color codes (#FF0000), byte manipulation, and low-level programming. Networking: Understanding packet data, MAC addresses (hex), and protocol analysis. Cryptography: Binary and hex representations are fundamental to encryption and hashing. Puzzles and games: Creating binary-encoded messages, escape room puzzles, or educational challenges.

ASCII Table Reference

Common characters and their values: Space = 32 (decimal) = 20 (hex) = 00100000 (binary) A-Z = 65-90 (decimal) = 41-5A (hex) a-z = 97-122 (decimal) = 61-7A (hex) 0-9 = 48-57 (decimal) = 30-39 (hex) The first 32 codes (0-31) are control characters (non-printable). Printable ASCII characters range from 32 to 126.