Number Base Converter
Processed locallyConvert between binary, octal, decimal, and hexadecimal. All bases update live.
About Number Base Converter
The Number Base Converter converts between binary, octal, decimal, and hexadecimal. Edit any field and the others update instantly. Handles negative numbers and large values. Invalid characters are highlighted. Use for hex color codes, bit flags, file permissions (octal), or debugging numeric values. Essential for low-level programming, systems work, and understanding binary representations. Shows which bases have valid values when input is ambiguous. All conversion runs in your browser.