Number Base Converter
Convert numbers between binary, decimal, octal, and hex
ABOUT
What is Number Base Converter?
Convert integer values between binary, octal, decimal, and hexadecimal notation using JavaScript BigInt. Large integers stay precise instead of being rounded like floating-point numbers.
ABOUT US
Small tools, built for the web.
Utilities that run entirely in your browser. No install, no signup, and your data never leaves your machine.
FAQ
Questions, answered.
Can it convert large integers safely?＋
Yes. The tool uses BigInt, so integers beyond JavaScript's safe Number range are not rounded during conversion.
Does it support decimals?＋
No. This converter is for integer bases. Use a separate calculation for fractional values.
Should hexadecimal input include 0x?＋
You can enter the digits without a prefix. The selected source base determines how the value is interpreted.