Number Base Converter

Number Base Converter

Binary, decimal, and hexadecimal

Number bases change how the same value is written. Decimal uses digits 0-9, binary uses 0 and 1, and hexadecimal uses 0-9 plus A-F. The value stays the same; only the notation changes.

Use this tool for programming, debugging, color values, bit masks, networking, embedded systems, and computer science study. For example, decimal 255 is FF in hexadecimal and 11111111 in binary.

Leading zeros may matter in code, addresses, permissions, and fixed-width values. The converter gives the numeric equivalent, but formatting rules may still depend on your target system.

Quick note

Related tools: Color Converter & Picker uses hexadecimal for web colors.