How do I convert a decimal number to binary online for free?

Enter your decimal number in the input above and select Decimal as the source base. The converter instantly shows the equivalent value in Binary (base 2), Hexadecimal (base 16), and Octal (base 8) simultaneously.

What number bases does the converter support?

The converter supports the four most common number bases in computing: Decimal (base 10), Binary (base 2), Hexadecimal (base 16, using digits 0–9 and A–F), and Octal (base 8). You can convert from any of these bases to all the others at once.

How do I convert a hexadecimal value to decimal?

Select Hexadecimal as the input base, enter your hex value (e.g. 1F4), and the decimal equivalent (500) and other bases appear instantly. Hex values are case-insensitive — you can enter A–F in uppercase or lowercase.

Does the number base converter handle negative numbers?

The current tool handles positive integers only. Negative number representation in binary (two's complement) depends on the word size (8-bit, 16-bit, 32-bit, etc.) and is not included in this tool.

Is the number base converter free and private?

Yes — free, no account, and everything runs in your browser in real time.

dec hex bin oct

Number Base Converter

Convert numbers between decimal, hexadecimal, binary, and octal. Instant, real-time, no upload.

Your files are processed locally and never uploaded to our servers.

Decimalbase 10

Hexadecimalbase 16

Binarybase 2

Octalbase 8

How it works

1
Type or paste input
Paste your value into the input field. No file needed — works directly in your browser.
2
Get instant results
The result appears in real time as you type. No server, no upload.
3
Copy the output
Click the copy button to copy the result to your clipboard instantly.

Frequently Asked Questions

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