Hex to Binary Converter

Convert hexadecimal numbers to binary and binary to hex instantly. Also shows decimal and octal. Free browser-based tool.

Hexadecimal Number

› ↓

Binary

Decimal

Octal

How to Use

1 Select Hex → Binary to convert a hex number to binary, or Binary → Hex for the reverse
2 Enter your hex number (e.g. FF) or binary number (e.g. 11111111)
3 Click Convert to see the binary result along with decimal and octal

Networking

Convert hex MAC addresses and IP address octets to binary for subnet mask calculations and network analysis.

Debugging

Translate hex memory dumps and register values to binary to inspect individual bits and flags.

Computer Science Learning

Visualize the direct relationship between hex digits and 4-bit binary groups to understand data representation.

How do I convert hex to binary?

Replace each hex digit with its 4-bit binary equivalent. For example, F = 1111 and A = 1010, so FA = 11111010.

Why do hex and binary convert so easily?

Each hex digit (0–F) maps exactly to a 4-bit binary group. This one-to-one correspondence makes hex a shorthand for binary without any arithmetic.

What hex digits are valid?

Valid hex digits are 0–9 and A–F (or a–f). This tool accepts both uppercase and lowercase letters and outputs uppercase.