Number Base Converter Online — Binary Hex Decimal
Convert integers between bases 2 and 36 with BigInt precision. Optional big-endian or little-endian byte grouping for hex and binary output.
How conversion works
Enter a value in the input base (digits A–Z case-insensitive). Convert to the output base — letters are uppercase for bases above 10. Byte endianness applies only when the output base is 2 or 16: the absolute value is padded to whole bytes and grouped (spaces). Otherwise endianness is ignored.
Options
Examples
Decimal → hex
Input
Output
Decimal → hex LE bytes
Input
Output
Related utilities
Encode binary-ish text with Base64, or explore bits via the regex tester for pattern masks.
Number base converter FAQ
Radix conversion questions
Why BigInt?
JavaScript Number loses precision above 2^53−1. BigInt keeps large integers exact for hex dumps and masks.
Are floats supported?
No — integers only. Fractions and IEEE floats are out of scope for this tool.
When does endianness apply?
Only for output bases 2 and 16. Other bases always print raw digits.
Is my value uploaded?
Never — conversion runs in your browser.
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