ONLYOFFICE Desktop Editors is a free, open-source office suite that combines document, spreadsheet, presentation, PDF, and PDF form editors with a diagram viewer into one offline desktop application for Windows, Linux, and macOS, aimed at anyone who works with Office Open XML files and wants a local, no-internet alternative to a proprietary office suite.

What it is

ONLYOFFICE Desktop Editors is the desktop application of the ONLYOFFICE project, published under the AGPL-3.0 licence and hosted in the ONL YOFFICE/DesktopEditors repository. It bundles several editors in one program: ONLYOFFICE Document Editor, Spreadsheet Editor, Presentation Editor, Form Creator, PDF Editor, and Diagram Viewer. The suite is fully compatible with Office Open XML formats — .docx, .xlsx, and .pptx — and also handles conversion between DOC, DOCX, ODT, RTF, TXT, PDF, HTML, EPUB, XPS, DjVu, XLS, XLSX, ODS, CSV, PPT, PPTX, and ODP through its core components.

The concrete problem it solves is desktop document work that would otherwise require a proprietary office suite and, in many cases, a network. Documents can be created, viewed, and edited while stored on a local Windows, Linux, or macOS machine without an Internet connection, so the suite replaces the paid desktop office package for users whose workflows are built around OOXML files. It also covers PDF form filling and PDF editing, which are often separate paid applications in competing stacks.

Key capabilities

• Six editors in one package: Document Editor, Spreadsheet Editor, Presentation Editor, Form Creator, PDF Editor, and Diagram Viewer.
• Full compatibility with Office Open XML formats: .docx, .xlsx, and .pptx.
• Offline creation, viewing, and editing of files stored on the local Windows, Linux, or macOS machine.
• Cloud connection for real-time collaboration with ONLYOFFICE, Moodle, Box, Dropbox, ownCloud, Nextcloud, Seafile, Liferay, and kDrive.
• AI-powered assistants and agents inside the editors.
• Digital signatures and password protection for documents.
• Localization into 46 interface languages, with RTL and hieroglyph support.
• Plugin support through the plugin and macros API, with plugins available from a Marketplace.

Who uses it and how

• Individual users who keep document sets on a local disk and need editing without an Internet connection.
• Teams that connect the desktop clients to a cloud service such as Nextcloud, ownCloud, Seafile, or kDrive to get real-time collaboration on shared files.
• Organizations running Moodle, Liferay, or Box that want desktop-side editing alongside their existing platform.
• Users in multilingual or RTL environments, served by the 46 interface languages and hieroglyph support.
• Developers who extend the editors with plugins written against the plugin and macros API and published to the Marketplace.

Getting started

The README points to the official desktop download page at https://www.onlyoffice.com/download-desktop#desktop for Windows, macOS, and Linux builds, with the project homepage at https://www.onlyoffice.com. The repository itself is the packaging of the application, split into the desktop-apps frontend, desktop-sdk, core, and sdkjs components, so building from source means assembling those components rather than running a single install command.

How it compares

The facts provide no list of paid products that this project replaces, and no directly comparable open-source office suite is named. Within this registry, therefore, ONLYOFFICE Desktop Editors stands alone as the entry for a multi-editor OOXML desktop suite.

When to use it — and when not to

Use it when desktop OOXML editing, PDF form filling, and optional cloud collaboration are the requirements, and when an AGPL-3.0 licence is acceptable for the intended distribution. Do not pick it if a prebuilt installer is not what is wanted, because the README is a product overview rather than a build guide: it documents the component repositories and the download page but gives no install, build, or packaging commands. Weigh the 465 open issues and the component-split build model before committing to compiling or repackaging it in-house.