LibreThinker

LibreThinker is an open-source extension designed to integrate AI-powered writing assistance directly into the LibreOffice Writer sidebar. It provides users with features such as rephrasing, summarizing, proofreading, translating, and generating drafts, all accessible without leaving the LibreOffice Writer environment. The tool is intended for individuals seeking to enhance their writing productivity and quality within LibreOffice Writer, eliminating the need to switch between different applications for AI writing support.

The extension connects to a free online large language model, which can be used without requiring signup. For those who prefer or require different AI providers, LibreThinker allows users to supply their own API keys to connect with services like OpenAI, Mistral, and others, or to integrate with a self-hosted Ollama instance. The setup process involves downloading the extension from the LibreOffice extensions directory, installing it via the Extension Manager, and accessing it through the sidebar in LibreOffice Writer. Users can customize their AI model connections through settings in the sidebar, specifying model IDs and API keys as needed.

LibreThinker is free to use and its source code is openly available. For users with heightened privacy or security needs, a fully self-hosted version of the LibreThinker server is offered as a paid service. This self-hosted option ensures that all data and requests remain within the user's own infrastructure, with no traffic passing through external servers, granting full control over data and deployment. The extension is developed and maintained by Mihail, a software engineer, and welcomes community support and contributions.

As an AI writing assistant tailored for LibreOffice Writer, LibreThinker positions itself as a solution for users who want integrated, customizable AI support in their document editing workflow.