Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
What Is the Number Base Converter?
The Number Base Converter transforms numerical values across positional numeral systems: Decimal (Base 10), Binary (Base 2), Hexadecimal (Base 16), and Octal (Base 8). It is essential for computer science students, embedded systems developers, and network engineers inspecting bitmasks and memory offsets.
All conversions run 100% inside your browser using JavaScript's arbitrary-precision BigInt engine, ensuring large integers up to hundreds of digits convert without IEEE-754 precision clipping.
Common Positional Numeral Systems
Decimal (10)
Standard human numeral system based on digits 0 through 9.
Binary (2)
The native language of machine hardware, microchips, and digital gates (0 and 1).
Hexadecimal (16)
Compact human-readable representation of bytes: 0-9 and A-F.
Octal (8)
Used historically in computing and for Unix file permission masks (0-7).
Frequently Asked Questions
Can I type into any box? ↓
Yes! Typing into any of the four inputs immediately recalculates and updates the other three in real-time.
What happens if I type an invalid character? ↓
The interface displays a polite validation warning preventing conversion until valid base symbols are supplied.
Does this tool support 64-bit and 128-bit numbers? ↓
Yes. Because it uses JavaScript native BigInt, there is no 32-bit or 53-bit integer overflow ceiling.