Binary / Number Base Converter
Type in any field — binary, octal, decimal, or hex — and all others update instantly.
Binary Base 2
Octal Base 8
Decimal Base 10
Hexadecimal Base 16
Binary Visualization
Enter a number above to see its bit representation.
ASCII Character: |
Custom Base Converter
Convert a number from any base (2–36) to any other base.
How to use
- Type any number in the Binary, Octal, Decimal, or Hex field — all four update simultaneously
- The bit visualization shows the binary representation grouped in nibbles (4 bits each)
- Bit info shows how many bits are needed, and the signed/unsigned range for that bit width
- If the decimal value is 32–126, the ASCII character is shown below the visualization
- The Custom Base Converter supports any base from 2 to 36 (uses 0–9 and A–Z)
- Hex input is case-insensitive
About this Binary Decimal
Use this free binary, decimal, hex, and octal converter to switch between common number bases. It is useful for programming, computer science, networking, electronics, and technical learning. No signup is required, and the tool works on phones, tablets, and desktop browsers.