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Number Base Converter

Convert between binary, octal, decimal, hex, and Roman numerals.

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Number bases

Binary:    101010
Octal:     52
Decimal:   42
Hex:       2A
Roman:     XLII
ASCII:     *

Frequently asked questions

Is Number Base Converter free to use?
Yes. Number Base Converter is part of TULAKITO's collection of free browser tools. No signup, no subscription, no usage limits.
Is my data safe with Number Base Converter?
Yes. Number Base Converter runs entirely in your browser. Nothing you type, paste, or upload is sent to any server.
Do I need to install anything?
No. Number Base Converter works directly in your browser on desktop and mobile — no downloads or extensions required.