Korekthor is a free add-on designed for the Chrome browser, specializing in advanced error correction for Czech text. Utilizing neural networks, it offers a sophisticated approach to identifying and correcting mistakes in writing, distinguishing itself from other tools by considering the context of sentences. This capability allows for a more comprehensive analysis and correction of text errors.

To use the extension, users are required to purchase a subscription from the official website, where a free trial is also available. After acquiring a subscription, users can log in through the extension to activate Korekthor. Currently, both the extension and the Korekthor system are in the beta testing phase, indicating ongoing development and potential updates in functionality.