FastOS Tools
FastOS Tools

Base Converter

Convert numbers between different bases (binary, octal, decimal, hexadecimal). Fast and accurate.

Number Base Converter

Introduction

The Base Converter tool converts numbers between different bases such as binary, octal, decimal, and hexadecimal. It is handy for learning number systems, debugging low‑level code, and working with IDs or bitmasks.

When to use this tool

Use this tool whenever you need to see how a value looks in another base: translating between human‑readable numbers and binary flags, or checking conversions used in code.

How to use

1

Enter the source number

Type or paste a number in its current base, such as decimal or hex.

2

Select source and target bases

Choose the base of the input value and the base you want to convert to (2, 8, 10, 16, etc.).

3

Convert the value

Click convert to instantly see the representation of the same value in the target base.

Examples

Converting error codes

Turn a hexadecimal error code from logs into decimal to compare it with documentation or API references.

FAQ

Related tools