Hex / Binary / Decimal Converter
Convert numbers instantly between decimal, hexadecimal, binary, and octal formats.
How to Use
- Select the input base (decimal, hex, binary, or octal).
- Type your number — all other bases update instantly.
- Click any result to copy it to your clipboard.
Frequently Asked Questions
QWhat is hexadecimal used for?
Hex (base 16) is commonly used for color codes, memory addresses, and byte-level data because each hex digit maps cleanly to 4 bits.
QWhat is the largest number this tool supports?
This tool supports standard JavaScript safe integers (up to 2^53 - 1). For larger values, dedicated BigInt tools are recommended.
QCan I convert negative numbers?
Yes — negative decimal numbers are converted using their signed representation across all bases.
About This Tool
Number base conversion is fundamental to computer science — binary (base 2) is how computers store data, hex (base 16) is a human-readable shorthand for binary, and octal (base 8) sees use in Unix file permissions.