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Binary Converter β€” Decimal Hex Octal Free

Convert between binary, decimal, hexadecimal, and octal number systems instantly.

Binary

Base 2

0 and 1 only

Decimal

Base 10

0–9 only

Hexadecimal

Base 16

0–9, A–F

Octal

Base 8

0–7 only

Common examples (decimal)

How It Works

01

Enter

Type in any number system

02

Convert

All formats update instantly

03

Copy

Copy any format with one click

Help Us Improve

Your feedback helps us build better tools.

About Binary Converter

Our free Binary Converter converts between binary, decimal, hexadecimal, and octal number systems instantly. Type in any base and all four formats update in real time.

Built for computer science students, developers, and electronics engineers who work with different number bases daily. All conversion runs locally in your browser.

Features copy buttons for each format, input validation with helpful error messages, and clickable example numbers for quick testing.

Read the full guide: 5 essential data encoding tools for developers

When Should You Use Binary Converter?

Programming

Convert between hex color codes and decimal values.

Computer science

Practice binary, octal, and hex conversions for exams.

Networking

Convert IP address octets and subnet masks between formats.

Embedded systems

Work with register values in different number bases.

Debugging

Decode hex dumps and binary flags during development.

Frequently Asked Questions