Reverso, JSpell.com, and Spell Check Online offer free spelling and grammar checks. On each website, the user types or pastes his word or phrase into a blank field, then clicks a button to have the program check for errors.
JSpell is a simple webpage that checks spelling in several different languages, but does not check for grammatical errors. Once the user types the word or phrase into the field, he clicks the "spell check" button. If the word is incorrect, a pop-up window appears with alternate suggestions.
Reverso's spell checker automatically corrects words that have few alternatives and gives writers the option to confirm or deny corrections. This system also fixes minor grammatical errors, such as missing pronouns.