# Number Base Converter Guide

Convert integers between binary, octal, decimal and hex.

- Tool: https://ilham.dev/tools/base-converter/
- Guide URL: https://ilham.dev/guides/base-converter/
- Tool guides index: https://ilham.dev/guides/tools/
- Broader guide: Calculators and Unit Conversion (https://ilham.dev/guides/calculators-and-unit-conversion/)

## What it does

Convert a number between binary, octal, decimal, hexadecimal and any base up to 36, working on the digits directly so long values are not rounded by floating point.

## Use the tool

Open https://ilham.dev/tools/base-converter/, add the input the tool asks for, run it, and check the output before using it elsewhere.

## Input and output

- Input: text.
- Output: text.
- Category: Convert.

## Privacy and processing
Processing happens locally in your browser. This tool does not upload the input to ilham.dev.

## Questions

### Why does the value not change when I paste a very long number?

Because it should not. This converter works on the digits rather than through a floating-point number, so a 64-bit value keeps every digit — which is the whole reason to use it instead of a calculator.

### How are values above 9 written in base 36?

With the letters A–Z after the digits, so 35 is Z and 36 is 10.