IPTool
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Number converter (HEX/OCT/BIN/DEC)
Convert between hexadecimal, decimal, octal and binary. Works with big integers and negatives.
HEX
Digits 0–9 and A–F; optional 0x prefix.
DEC
Digits 0–9; optional leading minus sign.
OCT
Digits 0–7; optional 0o prefix.
BIN
Digits 0–1; optional 0b prefix.
What it is
This tool converts numbers between hexadecimal, decimal, octal and binary representations. It supports big integers (via BigInt) and negative values.
How it works
Type a value in any field — the others update automatically. You can use optional prefixes: 0x for hex, 0o for octal, 0b for binary. Copy buttons help paste results elsewhere.
Limitations & notes
Fractions are not supported — this tool works with integers only. Input validation is strict for each base. Very large values are handled using JavaScript BigInt and are limited by your browser.