Hex / Decimal Converter

Convert between Hex, Decimal, Binary, and Octal.

Enter a number (any format)

About the Hex / Decimal Converter

The Hex Converter instantly translates numbers between hexadecimal (base 16), decimal (base 10), binary (base 2), and octal (base 8). Enter a value in any base and see the equivalent in all four systems simultaneously.

Number base conversion is a fundamental skill in computer science and embedded systems programming. Hexadecimal is the standard notation for memory addresses, color codes, byte values in network packets, and CPU registers — making it essential for low-level programming and debugging. Binary is the native language of digital hardware. Octal appears in Unix file permission notation (e.g., chmod 755).

All conversion runs locally in your browser using JavaScript's built-in parseInt() and toString() methods with explicit radix values. No data is sent to any server.