🚀 Wow1

Number Base Converter

Convert between Binary, Decimal, Hexadecimal & Octal instantly

Number Base Converter

Convert between Binary, Decimal, Hex & Octal

Input Format

How to Use

  1. 1 Enter a number in any format (binary, decimal, hex, or octal)
  2. 2 Select the input format or use auto-detection
  3. 3 View instant conversions to all number bases
  4. 4 Click Copy to copy any result to clipboard
  5. 5 Use the Quick Reference for common values

What You Get

Number base converter supporting Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16). Features auto-detection, grouped binary display, and a programmer-friendly reference panel.

Input: 255

Output: Binary: 1111 1111, Hex: FF, Octal: 377

Input: 0xFF

Output: Decimal: 255, Binary: 1111 1111

Input: 0b1010

Output: Decimal: 10, Hex: A, Octal: 12

How do I convert binary to decimal?

Enter your binary number (e.g., 1010) and the calculator instantly shows the decimal equivalent (10). Each binary digit represents a power of 2.

How do I convert decimal to hexadecimal?

Type any decimal number and see the hex result. Hexadecimal uses 0-9 and A-F where A=10, B=11, C=12, D=13, E=14, F=15.

What is the difference between binary and hexadecimal?

Binary (base 2) uses only 0 and 1. Hexadecimal (base 16) uses 0-9 and A-F. Hex is more compact - each hex digit represents 4 binary digits.

Why do programmers use hexadecimal?

Hex is compact and maps cleanly to binary (1 hex = 4 bits). It's used for colors (#FF0000), memory addresses, and byte values.

What does 0x mean in front of numbers?

0x is a prefix indicating hexadecimal notation (e.g., 0xFF = 255). Similarly, 0b indicates binary (0b1111 = 15) and 0o indicates octal.

Is my data secure?

Yes! All conversions happen in your browser. No data is sent to any server. 100% private and offline-capable.

100% client-side processing. Your numbers never leave your device.