Number Base Converter
Convert between Binary, Octal, Decimal & Hexadecimal. Supports custom bases 2–36 with real-time conversion.
How to Use
- Enter a number in any field — Binary, Octal, Decimal, or Hex.
- All other fields update instantly in real time.
- Use Custom Base to convert to bases 3–36.
- See the bit visualization below for binary representation.
Features
Real-Time
All fields update as you type.
4 Standard Bases
Binary, Octal, Decimal, Hex.
Custom Base
Convert to any base from 2 to 36.
Bit Viewer
Visual 8-bit binary representation.
Use Cases
- Programming: Convert between hex and binary for bitwise operations.
- Networking: Convert IP octets between decimal and binary.
- Color Codes: Convert hex color values to decimal RGB.
- Computer Science: Learn number systems and base conversions.
Understanding Number Bases
A number base (or radix) defines how many unique digits are used in a positional numeral system. Decimal (base 10) uses 0–9. Binary (base 2) uses only 0 and 1. Hexadecimal (base 16) uses 0–9 and A–F. Each base has specific applications in computing — binary for hardware logic, hex for memory addresses and colors, octal for Unix file permissions.
Developer Tools
Pair this tool with the Color Picker for hex color conversions. Generate hex strings with the Random String Generator. Compute hash values with the Hash Generator. Test calculations in the Online Code Editor.
Frequently Asked Questions
What bases are supported?
Standard bases (2, 8, 10, 16) plus custom bases from 2 to 36.
Does it handle large numbers?
Yes, using JavaScript's BigInt for numbers beyond standard integer limits.
What is the bit visualization?
Shows each byte (8 bits) of the binary representation with colored 0s and 1s.
Can I convert hex to binary?
Yes. Type in the hex field and binary updates instantly.
Is it free?
Yes, 100% free with no limits.