Best Free Online Grammar and Spell-Checker

• After the Deadline, checks your writing online but copying your text to the textbox and  get real time checking on spelling errors, grammar and style suggestions. Has a bookmarklet which adds a  Proofreader to your browser's bookmark bar so that you can check any text in a site by clicking on it and having a text box appearing after.

• PaperRater checks your document for grammar and spelling errors. Helps you to improve the document's readability, choice of words and style. This tools is made for high school, college and above writing. (For middle schools, it may have some errors)

• SpellCheckPlus, the free version is only limited to 2000 letters or about 250 words. It checks text for any grammar and spelling errors which are then highlighted with a brief explanations for you. When tested and compared with others, this tool was quite impressive and the clear winner for detecting grammatical problems.