Number Base Converter
FreeConvert numbers between binary, octal, decimal, and hexadecimal
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How it works
1
Enter
Type a number in any supported base: binary, octal, decimal, or hexadecimal.
2
Convert
The number is instantly converted to all other bases simultaneously.
3
Copy
Copy any converted value to use in your code, documentation, or calculations.
Frequently asked questions
What number bases are supported?+
The tool supports binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). These are the most commonly used bases in programming and computer science.
Is the conversion done on a server?+
No. All conversions run in your browser. Your input never leaves your device. The tool uses standard JavaScript number parsing for fast, accurate results.
Can I convert large numbers?+
Yes. The tool handles numbers within JavaScript's safe integer range. For extremely large values beyond 2^53 - 1, precision may be limited by browser number representation.
How do I enter a hexadecimal number?+
Type your hex value using digits 0-9 and letters A-F (case insensitive). You can include or omit the 0x prefix. The tool recognizes both formats.