How to reset all checkboxes using jQuery or pure JS?

If you mean how to remove the 'checked' state from all checkboxes:

$('input:checkbox').removeAttr('checked');

If you want to use form's reset feature, you'd better to use this:

$('input[type=checkbox]').prop('checked',true); 

OR

$('input[type=checkbox]').prop('checked',false);

Looks like removeAttr() can not be reset by form.reset().

I have used this before:

$('input[type=checkbox]').prop('checked', false);

seems that .attr and .removeAttr doesn't work for some situations.

edit: Note that in jQuery v1.6 and higher, you should be using .prop('checked', false) instead for greater cross-browser compatibility - see https://api.jquery.com/prop

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