To specify whether the element is to have its spelling and grammar checked, use the spellcheck attribute in HTML. The attribute checks spelling and grammar for text in input elements, <textarea> elements, and editable elements.
Note − It works for input elements, but not a password.
Example
You can try to run the following code to add spell checker in HTML −
<!DOCTYPE html> <html> <body> Subject : <input type = "text" name = "sub" spellcheck = "true"> <p>Add an incorrect spelling for a word above and see what happens.</p> <p contenteditable = "true" spellcheck = "true">This is an editable conttent, with a spelling mistake. Click to edit.</p> </body> </html>