The Orthography plugin for Obsidian helps users with grammar and spelling by identifying and suggesting corrections for errors in text. This plugin searches for spelling mistakes and provides options for correcting them with a single click. It is currently in alpha, with some instability and limited support for only English text. The plugin includes a personal dictionary feature to save custom words and integrates with Grammarly for added functionality. While the plugin does not yet support 'Live Preview' mode or mobile styles, it aims to offer dialect selection and a plagiarism checker in future updates.

The Harper plugin integrates a local grammar checker directly into Obsidian, providing users with instant, private, and open-source grammar correction. Unlike other tools, Harper runs entirely on your device, ensuring your data stays secure without the need for additional setup or internet connectivity. The plugin automatically checks your documents in real-time, highlighting errors as you type. Hovering over an error reveals suggested corrections for a seamless editing experience. With a lightweight design and efficient functionality, Harper enhances writing productivity while maintaining user privacy.

The LanguageTool plugin integrates the powerful grammar and spellchecking capabilities of LanguageTool into Obsidian. It allows users to perform advanced text checks, including grammar corrections, spellchecking, and language-specific enhancements. The plugin supports features like custom dictionaries, synonym suggestions, and multi-language spellchecking within a single document. Users can toggle automatic checks, clear suggestions, or manually check selected text or entire documents. For privacy-conscious users, it supports self-hosted LanguageTool instances. Premium users can access additional features with an API key configuration. This plugin is ideal for improving writing quality and handling multilingual documents efficiently.

The Write Good plugin enhances writing quality in Obsidian by highlighting common issues in English prose. It provides real-time suggestions to improve clarity and readability by detecting passive voice, weasel words, unnecessary words, and complex phrases. The plugin helps users refine their writing style by offering actionable feedback directly within their notes. Designed for writers, editors, and anyone looking to produce clearer text, it integrates seamlessly with Obsidian, ensuring that suggestions appear as users type.