Free online grammar checkers can be found at GrammarCheck.me, GrammarCheck.net and OnlineCorrection.com. Many word processing programs, such as Microsoft Word, have built-in grammar and spelling checkers.
Free grammar checkers are available that allow users to upload text to the website. The program then runs a test on the text to determine if there are errors. Limitations to online checkers include the inability to find and offer suggestions for all errors. For example, "to" and "too" may not be noticed when used improperly.
Online grammar checkers are limited in scope and should not be considered the final source for editing text.