One of the most common reasons people look at Linux is cost: a Microsoft 365 subscription adds up year after year, just to write letters and manage spreadsheets. The good news is that Linux comes with genuinely capable, free office software that handles the vast majority of everyday document work, including full compatibility with Word and Excel files.
Key takeaway: LibreOffice, included free with every major Linux distro, replaces Word, Excel, and PowerPoint for the great majority of everyday tasks, with no subscription and full compatibility with Microsoft file formats.
LibreOffice: the core replacement
LibreOffice is a full office suite that comes pre-installed on Linux Mint, MX Linux, and most other mainstream distros (and is a quick install from the Software Manager if not). It includes Writer (equivalent to Word), Calc (equivalent to Excel), Impress (equivalent to PowerPoint), and additional tools for databases and diagrams. Crucially, it opens, edits, and saves standard Microsoft formats — .docx, .xlsx, and .pptx — directly, so files shared with colleagues, family, or clients using Microsoft Office generally open and look correct.
| Microsoft 365 | LibreOffice equivalent | Notes |
|---|---|---|
| Word | Writer | Full .docx compatibility |
| Excel | Calc | Full .xlsx compatibility, supports most formulas |
| PowerPoint | Impress | Full .pptx compatibility |
| OneDrive | Nextcloud, or any cloud drive with a Linux client | Not built in; requires separate setup |
Where compatibility is genuinely excellent
For everyday documents — letters, CVs, invoices, basic spreadsheets with common formulas, and straightforward presentations — LibreOffice's compatibility with Microsoft formats is very strong, and most people won't notice a difference when opening files sent by others. Formatting such as fonts, tables, page layout, and standard spreadsheet functions all translate reliably in the vast majority of everyday documents.
Where to be more careful
Complex documents with advanced features can occasionally show minor formatting shifts: intricate macros written in Microsoft's VBA language don't run natively in LibreOffice (though LibreOffice has its own macro language), highly complex Excel spreadsheets with certain advanced formulas or pivot table features can behave slightly differently, and PowerPoint presentations with elaborate custom animations may not translate perfectly. For typical home and small-business use, none of this is likely to be a problem, but it's worth being aware of if your work involves particularly complex spreadsheets or macros.
Tip: If you regularly exchange documents with people using Microsoft Office, set LibreOffice's default save format to .docx and .xlsx (under Tools > Options > Load/Save) rather than its native ODF format, to minimise any compatibility friction when sharing files back and forth.
Other free office tools worth knowing about
OnlyOffice is another free, open-source option available on Linux, with an interface that mimics Microsoft Office's ribbon layout even more closely than LibreOffice, which some switchers find easier initially. For pure cloud-based document editing without installing anything, Google Docs and Sheets also work perfectly well through Firefox, and sync automatically across devices, which some users prefer to a locally-installed suite entirely.
Frequently asked questions
- Is LibreOffice really free, with no hidden costs?
- Yes, entirely. It's free and open source, with no subscription, licence fee, or feature paywall, and it's actively maintained with regular updates.
- Will my old Word documents open correctly?
- The great majority will open with formatting intact. Very complex documents with advanced macros or unusual formatting occasionally need minor adjustment, but this is uncommon for typical home or office documents.
- Can I still use OneDrive to store my files?
- OneDrive doesn't have an official Linux app, though it can be accessed through a web browser, or via unofficial sync tools. Many Linux users switch to a Linux-friendly alternative like Nextcloud, or simply keep files locally with a separate backup routine.