Alternatively referred to as a checkbox, selection box, or tick box, a check box is a square box where the user can click to say that they want or have a particular setting. Check boxes are used when more than one option may need to be selected. Checking the box would enable that option and unchecking it would disable it.
Check box example
Below is an interactive example of a check box. To select a check box or place a check in the check box with a computer mouse, click the check box with left mouse button. To check a check box with only a computer keyboard, press tab until the check box is highlighted or bold and then press the spacebar. To check a check box with a touchscreen tap your finger on the check box.
Tip: If you are using a smartphone or tablet and the screen is too small to check the correct check box you may need to zoom in on the screen.
What is the difference between a check box and a radio button?
A check box is always a square box and allows for one or more items to be selected. A radio button is typically a circle and only allows for one item to be selected.
Should I use checkbox or check box in my writing?
Both forms are correct, and its usage depends on the style guide you're following. When describing a selectable box or object, we follow the Microsoft Manual of Style and write "check box" as two words in all of our writing. When describing an attribute value, such as the "checkbox" value in an HTML input tag, it should be one word.