Developer tools

Number base converter

Convert whole numbers between bases 2 to 36 exactly.

Number base converter
Esc to restore

Your inputs

Results update as you type. Larger files run when you press Update result.

Your result

LOCAL & PRIVATE

Your result will appear here.

Your inputs stay in this browser. Nothing is uploaded or saved.

A clear answer. Here’s how.

Uses exact BigInt arithmetic. Supports signed whole numbers and digits 0–9, A–Z, with no prefix. Fractions and decimal points are not supported.

See a worked example

Worked example

A fixed demonstration, separate from the values you enter above.

Whole number
255
Input base (2–36)
10
Output base (2–36)
16

Example result

FF