Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Handles very large integers exactly, all in your browser.
FAQ
Is my input sent to a server?
No. All conversion happens entirely in your browser and no data leaves your device.
Can it convert very large numbers?
Yes. It uses BigInt, so numbers beyond the usual integer limit are converted without rounding errors.
Is hex input case-sensitive?
No. Both a–f and A–F are accepted, and the hex result is shown in uppercase.
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