Number Base Converter - Convert Decimal, Hex, Octal, Binary Online
Convert numbers between decimal, hexadecimal, octal, and binary bases instantly
Developer Tools
Number Base Converter - Convert Decimal, Hex, Octal, Binary Online
How to Use
1Enter your number in the input field
2Select the base of your input number
3All four base representations appear instantly below
Frequently Asked Questions
Hexadecimal (base 16) is widely used in computing for memory addresses, color codes (e.g. #FF5733), byte values, and debugging. It provides a compact representation of binary data.
Binary (base 2) is the fundamental language of computers. All data is ultimately stored and processed as binary digits (bits). Understanding binary helps with bitwise operations, network masks, and low-level programming.
Octal (base 8) is used in Unix/Linux file permissions (e.g. chmod 755) and was historically used in early computing systems. Each octal digit represents exactly 3 binary bits.
This tool uses JavaScript's built-in parseInt and Number.toString, so it supports integers up to 2^53 - 1 (Number.MAX_SAFE_INTEGER). For larger numbers, a dedicated big-integer library would be needed.