HTML

input checkbox

<div>
  <input type="checkbox" id="scales" name="scales"
         checked>
  <label for="scales">Scales</label>
</div>

<div>
  <input type="checkbox" id="horns" name="horns">
  <label for="horns">Horns</label>
</div>

HTML Input Checkbox Example

<form>
  <label for="dog">Dog:</label><input type="checkbox" id="dog" value="dog"/>
  <label for="cat">Cat:</label><input type="checkbox" id="cat" value="cat"/>
  <label for="hedgehog">Hedgehog:</label><input type="checkbox" id="hedgehog" value="hedgehog"/>
  <label for="yak">Yak:</label><input type="checkbox" id="yak" value="yak"/>
</form>

html checkbox

<input type="checkbox" id="demoCheckbox" name="checkbox" value="1">
<label for="demoCheckbox"> Check me!</label>