TwinMarker is a Free Online Grammar Checker for English language learners. The add-on adds the data import and export features to the generic version. This add-on allows you to copy the text from the focused area on a web-page and write it back to the source page. The grammar checking is performed on the server-side (
File Size6.61 kB
Operating System Windows XP Windows 2003 Windows Vista Windows Server 2008 Windows Windows 7
System RequirementsMozilla Firefox 5.0 - 10.0