ONLYOFFICE Desktop Editors 9.4.0

Open-source ONLYOFFICE Desktop Editors delivers full MS Office compatibility, PDF form creation, and extensible plugin support.

Razvan Serea News Reporter Neowin · May 19, 2026 14:38 EDT with 0 comments

ONLYOFFICE

OnlyOffice Desktop Editors is an open-source office suite distributed under AGPL v.3 that combines text, spreadsheet and presentation editors allowing to create, view and edit documents stored on your computer. The application does not require constant connection to the Internet and allows youto create, edit, save and export text, spreadsheet and presentation documents. It is fully compatible with Office Open XML formats: .docx, .xlsx, .pptx.

One pack - five editors - multiple features

Create, view and edit text documents, spreadsheets and presentations of any size and complexity. Work on documents of most popular formats: DOCX, ODT, XLSX, PDF, ODS, CSV, PPTX, ODP, etc. Deal with multiple files within one and the same window thanks to the tab-based user interface. Highest compatibility with Microsoft Office formats.

Real-time collaboration within your favorite cloud

Connect ONLYOFFICE Desktop Editors to the cloud platform of your choice: ONLYOFFICE, Nextcloud or ownCloud to collaborate on documents with your team – co-edit in real time, review, comment and interact using chat.

Extending your editing capabilities

Take the most of your editing with the collection of third-party plugins. Insert a YouTube video, add special symbols or a ClipArt object, automatically translate any word or sentence, highlight code, etc. Do even more! Create your own plugin using the API documentation and ready-to-use examples available on GitHub.

OnlyOffice key features:

View, edit, and collaborate on docs, sheets, slides
Build fillable PDF forms and fill them in online
Read and edit PDFs, export/import to/from PDF
Convert docs to Markdown and HTML
Turn your textbooks into e-books
Generate texts with the AI helper

OnlyOffice 9.4.0 changelog:

New features / All Editors

Added Croatian language interface translation (hr-HR, Hrvatska)
Moved chart settings from the right panel to a separate Chart design tab
Added options for pasting from the clipboard for the Paste button on the top toolbar

Document Editor

Implemented the ability to add a horizontal line

Spreadsheet Editor

Added the Dark mode support for the sheet

Presentation Editor

Added 25 new presentation design themes
Added 20 new slide transitions, grouped by category

Forms

The app saves the most recently added image in the Signature field so it can be automatically used when filling out the form again
Added the "Send for signing" and "Filling status" panels

Security

Fixed out-of-bounds read vulnerabilities when converting XLS to XLSX in the following functions: ChartSheetSubstream::recalc, TextPropsStream::readFields, MetroBlob::ReadComplexData, SUPBOOK::serialize_book and ATTACHEDLABEL::serialize_rPr
Fixed a vulnerability in GUID generation that allowed an attacker to calculate GUIDs based on their creation time
Fixed a vulnerability that allowed bypassing macro sandbox restrictions and accessing environment objects via sloppy-mode this and eval