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Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal bases instantly in your browser.

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Number Base Converter
Convert between binary, octal, decimal, and hexadecimal in real time.
Real-time conversionZero uploads
InputType a number
ConversionsAll bases
Binary (Base 2)—
Octal (Base 8)—
Decimal (Base 10)—
Hexadecimal (Base 16)—
ReadyBrowser only
Enter a number and select its base to convert.
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Number Base Converter

Working with different number bases is a daily task for programmers, embedded systems developers, and computer science students. Whether you are reading memory addresses in hexadecimal, debugging bitwise operations in binary, or converting file permissions in octal, a quick converter saves time and prevents errors.

This tool converts numbers in real time between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Simply select your input base, type a number, and see all conversions update instantly. Click any output value to copy it to your clipboard.

How to Use the Number Base Converter

  1. Select the base of your input number (binary, octal, decimal, or hex).
  2. Type or paste your number into the input field.
  3. View real-time conversions to all other bases.
  4. Click any output value to copy it to your clipboard.

Number Base Converter Examples

Before 
Decimal: 255
After 
Binary: 11111111 | Octal: 377 | Hex: FF

Frequently Asked Questions

  • Does it support large numbers?

    The tool supports numbers within JavaScript's safe integer range (up to 2^53 - 1). For most programming tasks, this is more than sufficient.

  • Can I convert from hex to binary directly?

    Yes. Select 'Hexadecimal' as your input base, type your hex value, and the binary output updates instantly.

  • Is the conversion performed locally?

    Yes. All conversions happen locally in your browser with zero server calls.

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