Number Base Converter

About the Number Base Converter

Convert integers between binary, octal, decimal, hexadecimal, and any custom base from 2 to 36. The converter uses BigInt so large IDs, bit masks, checksums, and protocol values stay exact instead of being rounded by floating-point math.

How the result is produced

Integer strings are parsed with BigInt and converted to bases from 2 through 36, avoiding floating-point rounding for large identifiers, masks, and protocol values.

Example: The decimal value `255` becomes `11111111` in base 2, `377` in base 8, and `ff` in base 16.

Limitations and review notes

The converter handles integers rather than fractional values or floating-point representations. Prefixes, signed conventions, overflow expectations, and byte order still depend on the system consuming the value.

How to use it

1. 1. Enter an integer and choose its source base.
2. 2. Pick any custom output base from 2 to 36.
3. 3. Review binary, octal, decimal, hex, and custom-base results.
4. 4. Copy the representation you need.

FAQ