Number Base Converter
Convert numbers between binary, hexadecimal, decimal and octal instantly. Free programmer number converter.
Frequently asked questions
- How do I convert between number bases?
- Type into any of the four fields (binary, decimal, hexadecimal or octal) and the other three update instantly, along with a bit count and extra details.
- What is the signed 32-bit value?
- It is the same number interpreted as a two's complement 32-bit integer, which is how many programming languages store whole numbers. Values above 2147483647 appear as negative numbers.
- What does the UTF-16 char output mean?
- It shows the character whose code point equals your number, so 65 displays as A and 97 as a. It is a quick way to check ASCII or Unicode values.
- Does it support negative or fractional numbers?
- No. It converts non-negative integers only, and very long inputs may lose precision once they exceed the safe integer range of JavaScript.
This tool runs entirely in your browser. No data is uploaded anywhere.