Number Base Converter

Convert between binary, octal, decimal & hex.

2→16 Number Base Converter Interactive Tool
Input
Output
Binary
Octal
Decimal
Hex

Convert numbers between binary (2), octal (8), decimal (10) and hexadecimal (16) entirely in your browser:

  • Pick the base of your input from the Base selector, type or paste a number, and all four results update live.
  • Negative numbers (-255) and fractions (101.11 in binary, 1F.8 in hex) are fully supported.
  • Underscores work as digit separators (1111_0000, FF_FF) for readability.
  • Each result row has its own copy button; Live toggles auto-conversion; Clear resets both panes.
  • Invalid digits for the selected base show a clear error in the status bar.

Everything runs locally - your data never leaves your device.