Spell Checker the as you type spell checker, check your spelling on the fly, no more typo's in text areas or web forms. The Spell Checking capabilities of this little script are brilliant it will spot misstypes, typos or spelling mistakes in an instant. Spell Checker works automatically on the fly as you or your website visitors type into either a text input element or textarea within a web form. When typing stops the spell checker will check all of the typed words and if there is any typo's it will give you alternative suggestions.