Free online grammar and spell check tools are available on sites such as Reverso.net, PaperRater.com, GrammarCheck.com and SpellCheckPlus.com. A free grammar and spell check browser add-on is also available on Grammarly.com, which enables users to check spelling and grammar when typing online.
The grammar and spell check tool on Reverso.com allows users to check sentences and paragraphs using both U.S. and United Kingdom spellings for words. Paper Rater's tool allows users to either type text directly into an input box or upload a file to have the entire document checked. To install the Grammarly browser add-on, users need to use a supported browser and accept the tool's terms and conditions.