Online grammar checkers are digital tools designed to help users identify and correct grammatical errors in their writing. They analyze text for issues such as punctuation mistakes, sentence structure problems, and incorrect verb tenses. These tools are often used by students, professionals, and anyone looking to improve their writing skills. Many online grammar checkers also offer additional features, such as style suggestions and vocabulary enhancements. Popular examples include Grammarly, ProWritingAid, and Hemingway Editor. These tools can be accessed through web browsers or integrated into word processing software, making them convenient for everyday use.