LibreOffice is a free and open-source Office Productivity Suite from The Document Foundation, presented as the successor to OpenOffice.org. LibreOffice is compatible with a wide range of document formats such as Microsoft® Word (.doc, .docx), Excel (.xls, .xlsx), PowerPoint (.ppt, .pptx) and Publisher. LibreOffice also provides native support for the open standard, the Open Document Format (ODF). Work can also be exported in many different formats, including PDF.

The suite includes Writer (word processing), Calc (spreadsheets), Impress (presentations), Draw (vector graphics and flowcharts), Base (databases), and Math (formula editing). It is available in an installed edition (available in Windows, Mac OS, and Linux versions), through mobile apps for Android and iOS.

Writer's features are aimed at presenting an open source alternative to Microsoft Word of the Microsoft 365 Office Suite. It is a word processor and desktop publishing solution. It is described by its developers and power users as able to support the creation of a book with diagrams, indexes, and illustrated content. Writer also includes typical word processor features such as various fonts, page layout and editing tools, and an autocorrect library. Writer also can be extended with templates, and comes with Wizards to help the user through more advanced workflows (e.g. mail merges). Common complex documents are supported with templates by default, and more niche forms may have templates available through extensions created by the supporter community.

A free spreadsheet program designed to be easy to use but able to support more advanced calculations , with wizards to guide the user through some commonly needed advanced number crunching and report generation. Calc includes a Scenario Manager to perform "what if..." analyses, and a solver component that enables the user to find optimum value of a particular spreadsheet given constraints appearing in other cells. Also, its "DataPilot" features lets Calc pull raw data from exogenous data sources, and also integrate real-time data streams.

Impress lets users create slides, similar to PowerPoint, presenting a free alternative to the popular presentation tool. Impress can also be used for diagramming, or for creating and displaying drawings. Its Fontworks tool also lets users create and insert 2D and 3D images into presentations. Impress supports working with multiple monitors, and users can share slide notes, operate a presentation slider, etc.

The LibreOffice suite also includes a graphics and diagramming tool. Draw also is designed to be relatively simple to use for quick sketches but also is able to support more advanced technical drawings, or brochures and the like that might be used to support marketing activities. Users can also work with existing graphical objects, using LibreOffice Draw as an editing tool with cropping, grouping, etc.

Base is designed to meet a range of enterprise DB requirements, and natively includes drivers for popular used database engines, such as MySQL, MS Access, and PostgreSQL. It includes JDBC- and ODBC- built-in support, to extend its versatility and enable Base to be connected to virtually any database. Wizards are present for help with database design, and it includes pre-defined tables for common use cases (e.g. sales orders, asset tracking, etc.).

Math is a standalone formula editor that can be used to generate formulae for presentations, spreadsheets, and word processors. Users can work with a range of elements with a pure focus on the math.

Similar to Math, LibreOffice also allows the user to work with charts in a freeform way, focusing on style, color, size, etc. across a variety of pie charts, bar charts, trend graphs, or 3D charts, so that the user can focus on perfecting its style before putting the chart on display in whatever presentation, drawing, or document its destined for.

LibreOffice is supported by an active community, FAQ, and documentation from The Document Foundation. Also, LibreOffice tutorials are plentiful and found online in video format. While The Document Foundation does not provide commercial support directly for enterprises, they do maintain a certification program for trainers, developers, and professional consultancies that do wish to provide premium support for LibreOffice implementations and on-going supports. Also, while LibreOffice is an installed option, a cloud-based service based on LibreOffice is available through Collabora Online, a SaaS based on the LibreOffice Office Suite that is available in a browser.