Open Source Tools

5 Best Open Source Alternatives to Word

Updated July 2026

Leaving Microsoft Word means two different things depending on who is asking. Most people want a familiar editor that opens their .docx files without mangling formatting, tracked changes, or templates. A smaller group has the opposite problem: they are hand-producing invoices, contracts, or reports one at a time when the content really lives in a database and should be generated. Open source covers both. There are full office suites that read and write Office formats and run on your own machines or servers, and there are template engines that render finished DOCX and PDF files from your data on demand. The deciding factor is whether Word is your writing tool or a bottleneck standing between records and finished paperwork.

ONLYOFFICE Docs logo

1.ONLYOFFICE Docs

6.6kAGPL-3.0Shell Self-host
ONLYOFFICE Docs screenshot

ONLYOFFICE Docs is a free collaborative online office suite with viewers and editors for text documents, spreadsheets, presentations, forms, PDFs, and diagrams. It is fully compatible with Office Open XML formats - .docx, .xlsx, and .pptx - and supports real-time collaborative editing.

  • Editors for text documents, spreadsheets, presentations, forms, PDFs, and diagrams
  • Real-time collaborative editing
  • Office Open XML compatibility for .docx, .xlsx, and .pptx
  • Reviewing, spell-checking, accessibility features, and dark mode
More about ONLYOFFICE DocsVisit website
ghostwriter logo

2.ghostwriter

4.9kGPL-3.0C++
ghostwriter screenshot

ghostwriter is a text editor for Markdown on Windows and Linux. It is built for writing in plain text Markdown without distractions, whether the target is a blog post, school paper, or long-form draft. Files remain ordinary Markdown text, so the content is not tied to a proprietary document format.

  • Distraction-free Markdown writing environment
  • Built-in cmark-gfm Markdown processor
  • Auto-detects Pandoc, MultiMarkdown, and cmark
  • Live HTML preview and export options
More about ghostwriterVisit website
LibreOffice logo

3.LibreOffice

4kGPL-3.0C++
LibreOffice screenshot

LibreOffice is an integrated office suite for personal productivity. It is compatible with most document formats and standards, and includes applications for writing documents, working with spreadsheets, creating drawings, and building presentations.

  • Writer for word processing documents
  • Calc for spreadsheets
  • Draw and Impress for drawings and presentations
  • Compatible with most document formats and standards
More about LibreOfficeVisit website
Carbone logo

4.Carbone

2kOtherJavaScript Self-host
Carbone screenshot

Carbone turns JSON data into finished documents. You design a template in LibreOffice, Google Docs, or Microsoft Office and drop in JSON-like markers such as {d.companyName}; Carbone fills the markers from your data and outputs PDF, DOCX, XLSX, ODT, PPTX, ODS, XML, or CSV. The data comes straight from your existing JSON APIs.

  • Fills office templates from JSON data with markers
  • Outputs PDF, DOCX, XLSX, ODT, PPTX, ODS, XML, CSV
  • Designs templates in LibreOffice, Docs, or Office
  • Drives headless LibreOffice for document conversion
More about CarboneVisit website
Wraft logo

5.Wraft

147AGPL-3.0Elixir Self-host
Wraft screenshot

Wraft is an open-source document lifecycle management and content authoring platform for structured business content, from official letters to contracts. It aims to give teams control over their most important documents across drafting, collaboration, and distribution.

  • Authoring of structured business documents
  • Drafting, collaboration, and distribution workflow
  • Content stored as Markdown and JSON
  • Hosted cloud or self-hosted deployment
More about WraftVisit website

Our picks

Two of these replace the Word editor; the third replaces the act of typing documents at all.

Best for real-time coauthoring: ONLYOFFICE Docs ONLYOFFICE Docs is fully compatible with .docx, .xlsx, and .pptx and is built around real-time collaborative editing, with reviewing and spell-check included. It can be self-hosted in Community, Enterprise, or Developer editions and connects to sync-and-share platforms, which suits teams that want Microsoft 365-style coauthoring on their own servers.

Best desktop replacement: LibreOffice LibreOffice bundles Writer, Calc, Draw, and Impress with broad document-format support and StarBasic macro scripting through its UNO APIs. Backed by The Document Foundation and free to use and distribute, it is the natural fit for single-user desktop editing across Windows, macOS, and Linux.

For generating documents from data: Carbone Carbone is not an editor. It fills office templates from JSON and outputs PDF, DOCX, XLSX, ODT, and more, driving headless LibreOffice for conversion. It fits teams producing invoices, contracts, or reports in bulk from a database rather than editing them one at a time.

Which Word problem are you solving

The documents that make Word sticky are the ones with strict formatting, shared review cycles, templates, fields, mail merge, and VBA macros. If your files leave the company as Word documents, fidelity matters more than principle, and a compatible editor is the goal. ONLYOFFICE Docs is built around Office Open XML compatibility for .docx, .xlsx, and .pptx with real-time collaborative editing, so it fits teams that need coauthoring. LibreOffice covers the same editing across Writer, Calc, Draw, and Impress with broad format support and macro scripting, and works well for single-user desktop work.

If the real problem is producing many documents from records, an editor is the wrong tool. Carbone takes that job: you design a template in an office application, drop in JSON markers, and it renders PDF, DOCX, XLSX, and other formats from your data, driving headless LibreOffice for conversion. Whichever path you take, expect rough edges where Word users rarely look. Page breaks can move because font metrics and layout engines differ, tracked-change metadata can shift, and macros are the biggest gap because Word automation assumes VBA and its object model.

Treat migration as staged document cleanup, not a bulk conversion. Keep original DOCX and legacy DOC files as the record copy, then test representatives: contracts, letterhead, forms, heavily reviewed drafts, and macro-enabled templates. Styles, headings, tables, comments, and simple fields usually survive, while macros, embedded objects, protected forms, and exact pagination need manual testing. Export to DOCX or PDF only at exchange boundaries so you are not round-tripping the same file through formats every day.

Related alternatives

Notion17Microsoft Office6Excel6Obsidian14OneNote9Trello17

Frequently asked questions

Will my Word documents open correctly in an open source editor?+

Most plain DOCX files open well, especially documents built from normal paragraphs, headings, tables, images, and simple headers or footers. Trouble shows up with exact page breaks, floating objects, custom fonts, content controls, and complex fields. Test with your own documents rather than samples, and compare both the editable file and the exported PDF side by side.

What happens to tracked changes and comments?+

Basic tracked insertions, deletions, and comments usually transfer through DOCX, but the review history is not always identical. Comment threads, resolved status, author names, timestamps, and change grouping can shift between editors. Before replacing Word in a review-heavy workflow, run a full redline cycle - create changes, reply, accept and reject - then reopen the file in Word to confirm.

Are Word macros and add-ins portable?+

Usually not. Word macros rely on VBA, the Word object model, and sometimes COM automation or installed add-ins. Some logic can be rewritten elsewhere, but there is rarely a one-click conversion. Inventory macro-enabled templates first, identify which are still used, and rebuild the business logic as a clearer workflow rather than a line-by-line port.

Can I generate documents from data instead of editing them?+

Yes, and that is Carbone's whole purpose. You design a DOCX or PDF template in an office app, mark where data goes with JSON markers like {d.companyName}, and Carbone renders finished files from your JSON on demand. It drives headless LibreOffice for conversion and embeds in Node.js or runs from a CLI, turning thousands of documents into one job.

Do these handle Word mail merge?+

Both LibreOffice and ONLYOFFICE can do document-and-data merges, but the details differ. Test the actual data sources, conditional fields, date and currency formatting, labels, and batch output. If your Word merge depends on macros or a live database, separate data preparation from document generation first, and for high-volume output a template engine like Carbone is often a cleaner fit than a merge feature.

Can several people edit at once, like Microsoft 365?+

ONLYOFFICE Docs is built for real-time collaborative editing and can be self-hosted, so coauthoring with presence is first-class on infrastructure you control. LibreOffice is primarily a desktop suite, so shared editing there is closer to file locking and turn-taking than simultaneous typing. Match the choice to whether your team genuinely edits the same document at the same time.

Which format should become the team standard?+

If you mostly work inside the new suite, use its native Open Document Format as the working copy and export DOCX or PDF only when sending files out. If customers, courts, or regulators require Word files, keep DOCX as the exchange format and budget more compatibility testing. The goal is to avoid round-tripping the same document through formats daily.