When do I need binary?

Binary is used in bitwise operations, network masks, file permissions, and understanding how computers store data at the lowest level.

Why is hex used for colors?

Hexadecimal maps cleanly to binary (each hex digit = 4 bits). Two hex digits represent a byte (0-255), perfect for RGB color channels.

Base 64 uses a different encoding scheme (letters + numbers + symbols). Use our Base64 Encoder tool for that conversion.

Developer Tool

Convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). See all 4 formats simultaneously.

100% free — no account needed

From Base

To Base

Input Number

Binary, octal, decimal, and hex in one view

Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).

See your number in all 4 formats at the same time.

Swap from and to bases with one click.

Quick-load values like 255, 128, ASCII codes, and color values.

Developer Tools

Unit converter, color converter, timestamp converter, and more.