How to use the Count Binary Ones
- Enter or paste your input in the box (or set the options, if the tool needs no input).
- Adjust the options to match what you need — the result updates as you type.
- Copy the result or download it, and keep editing if you want a different outcome.
What does this tool do?
The number of set bits is called the population count or Hamming weight. It is used in coding theory, hashing and low-level programming. Paste one binary number per line; spaces and underscores inside are ignored.
Everything runs in your browser, so nothing you enter is uploaded or stored.
Why use it?
- Free, with no sign-up and no limits.
- Instant results as you type.
- Private — your data stays on your device.
Example
Input: 10110100
Result: 4
Privacy
Everything you type is processed in your browser. Nothing you enter is sent to our servers or stored by us. There's no account to create and nothing to install.
Frequently asked questions
What is the Hamming weight?
It is simply the number of 1 bits in a binary value.
Is the Count Binary Ones free to use?
Yes. It is free, needs no account and has no daily limit.
Last reviewed by the M2Toolkit team.