Base Converter
Real-time conversions between Binary, Octal, Decimal, and Hexadecimal.
What is this tool?
The Base Converter performs real-time number conversions across Decimal (Base 10), Binary (Base 2), Octal (Base 8), and Hexadecimal (Base 16). Powered by JavaScript BigInt, it supports arbitrarily large integers without standard floating-point precision loss. Editing any base field immediately computes the values in all other three representations.
How to convert numbers between bases
- Enter a number into any one of the four fields: Decimal, Binary, Octal, or Hexadecimal.
- The remaining three fields automatically calculate and update in real time.
- If an invalid character is entered (such as '9' in binary), an error message displays immediately.
- Use the copy button next to any format to copy that specific number.
Key Features
- Supports Decimal (Base 10), Binary (Base 2), Octal (Base 8), and Hexadecimal (Base 16)
- Arbitrary-precision arithmetic powered by native JavaScript BigInt
- Simultaneous bidirectional synchronization across all four number systems
- Inline input validation for prefix and base-specific character restrictions
Frequently Asked Questions
What number bases does this converter support?
The converter supports the four most common computer science number systems: Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16).
Can this tool handle very large numbers?
Yes. It utilizes JavaScript BigInt rather than standard IEEE 754 floating-point numbers, allowing you to convert arbitrarily large integers without precision loss.
What is Hexadecimal used for in programming?
Hexadecimal uses 16 digits (0-9 and A-F). Each hexadecimal character represents exactly 4 bits (a nibble), making it a concise, human-friendly way to represent binary bytes, memory addresses, and color values.
Can I convert bytes into decimal values?
Yes. Simply paste or type your binary byte string into the Binary field, and the exact decimal equivalent will calculate instantly.
Privacy First
All mathematical calculations execute locally in your browser. No numbers are logged or sent to servers.