As of 2015, Grammarly.com no longer supports or offers its free browser extension for checking the spelling and grammar of text. Instead, it prompts users to sign up for its paid service to check text typed into the Web tool or by uploading a document to the service.
The former browser extension, known as Grammarly Lite, allowed users to instantly check the spelling and grammar of text. The tool instantly checked the text as you typed, identifying any errors with visual markings and allowing you to change them accordingly. As the service no longer exists, users must sign up for one of the company's payment plans to have consistent access to the service, which performs the same spelling and grammar checks on text along with some additional features.
The company also offers a free downloadable extension that adds its spelling and grammar checking tool to Microsoft Word and Microsoft Outlook, though these require you to have those programs already installed on your computer. The Web version of the program allows users to upload text documents and check spelling and grammar, along with the ability to replace words to enhance the overall vocabulary usage within the document. It also offers a plagiarism check against billions of existing online texts, ensuring that the document does not feature the same wording as other articles.