Base 10 → Base 2

Decimal to Binary

Convert decimal numbers into binary bit strings.

Single or multiple values Optional 8-bit padding Copy-ready output
Converter

Readable binary in seconds

Paste decimals, choose formatting, and copy binary strings for classwork, debugging, or docs.

Decimal → Binary

Convert decimals to binary

Enter one or many decimal integers separated by spaces or new lines. Pad to 8 bits if you prefer.

Binary formatting

Decimal to binary converter

Use this decimal to binary converter to translate base 10 numbers into base 2. Keywords: decimal to binary converter, convert decimal to binary online, base 10 to base 2.

How to use this tool

  1. Paste one or more decimal numbers.
  2. Choose spacing and padding options.
  3. Click Convert to Binary.
  4. Copy the binary results or view the table.

FAQ – Decimal to Binary

What numbers can I convert?

Non-negative integers in base 10. Invalid entries are skipped and counted.

Does this support negative numbers?

No. Please use non-negative integers. Negative values are marked invalid.

What does pad to 8 bits mean?

Each binary string is left-padded with zeros to a minimum length of 8 bits, useful for byte-aligned output.

Is this free and mobile friendly?

Yes—free to use with a responsive layout for phones and tablets.