Base Converter
Convert numbers between binary, decimal, and hexadecimal.
Input
Base
Decimal
255
Hex
0xff
Binary
0b11111111
Related tools
Number Base ConverterConverter
Convert numbers between any bases (2-64) with step-by-step explanations.
Roman Numeral ConverterConverter
Convert between integers and Roman numerals (1-3999) with live conversion.
Number to WordsConverter
Convert numbers up to quintillions to English words.
JSON → CSVConverter
Convert JSON arrays to CSV locally.
CSV → JSONConverter
Convert CSV to JSON locally in your browser.
JSON to YAML ConverterConverter
Convert JSON to YAML with configurable indentation.
About Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and arbitrary bases. A quick reference when working with bit masks, color values, or low-level protocols.
How to use
- Enter a number and its current base.
- Pick the target base (or several).
- Copy the converted values.
Frequently asked questions
- Can I convert very large numbers?
- Yes — conversions handle large integers beyond the usual 53-bit safe range.
- Does it support custom bases?
- Yes — in addition to 2, 8, 10, and 16 you can convert to other bases up to 36.