Microsoft Office Without Paying: Free Alternatives Compared by How Well They Open Your Word and Excel Files

You can replace Microsoft Office without paying anything. The suite you choose decides whether a Word or Excel file still looks right when it gets back to your lecturer, client or boss. Every free alternative to Microsoft Office reads Microsoft’s .docx and .xlsx formats in its own way. That means what survives depends more on how the file was built than on the suite’s marketing. Plain essays, CVs and simple budgets usually come through well. Layout-heavy templates, citations and spreadsheets with automation are where the differences show.

Each suite handles the file differently. OnlyOffice says it edits Microsoft’s formats directly. LibreOffice works in its own OpenDocument format and opens and saves Microsoft files alongside it. Google Docs and Microsoft’s free Word and Excel both run in your browser. None of this tells you which one is safe for your file. The answer starts with what actually happens inside a file when it moves.

Why Your Word and Excel Files Change When You Open Them in a Free Suite

A .docx or .xlsx file is really a bundle of instructions: this heading uses this style, this text box sits here, this cell runs this formula. Microsoft calls the format Office Open XML (OOXML). Any program can read those instructions, but each one draws the result with its own engine. A “round-trip” means opening a file, editing it and saving it back to the same format. It’s the moment small differences in reading those instructions become permanent changes to the file.

The suites don’t read the file the same way. OnlyOffice says it dropped its temporary internal formats in 2013 and moved to native OOXML editing “without any intermediate conversion.” That’s the vendor’s own description. LibreOffice’s home format is OpenDocument. Its help pages describe Microsoft formats as ones it can open and save, and they include a wizard for converting whole folders into OpenDocument. Google’s help centre states the risk plainly. When you edit an Office file in Google Docs, some features are hidden but kept, while others may be lost or altered, and a notification appears when that’s about to happen.

What breaks depends on what’s inside the file. WPS publishes its own file-by-file risk list, and it’s useful even though it comes from a vendor. For Word files, it treats plain text formatting, simple tables and basic headers as low risk. It flags complex section breaks, automatic tables of contents, cross-references, mail merge, embedded objects and Office-only fonts, which get swapped for similar-looking ones. For Excel, the high-risk items are VBA macros, Power Query and external data connections, pivot tables fed by outside sources, add-ins, and complex array formulas. For PowerPoint, they’re complex animations, embedded audio and video, and SmartArt.

Real cases fit that pattern. One Reddit user writing academic work in LibreOffice described compatibility issues with Zotero references, meaning citations managed by a reference tool. A LibreOffice bug report describes text boxes overlapping in a heavily formatted document. Neither shows how often this happens. Both show that “it opened” and “it kept everything” are separate questions.

How We Tested (and What “Compatible” Actually Means)

The verdicts here don’t come from a single lab session. They’re built from each vendor’s own documentation, the limits Microsoft and Google publish for their free tools, bug reports, and first-hand accounts from people who switched. Each source is linked where it’s used. The four checks below are the ones you should run on your own files, because your files are the only ones that matter.

In this article, a suite counts as “compatible” with a file only if it passes all four checks:

1. It opens cleanly. No error, no blank screen, no missing pages.
2. It looks the same. Fonts, spacing, page breaks, tables and images sit where Word or Excel put them.
3. It still works. Formulas calculate, tables of contents update, and charts reflect the data.
4. It survives the trip back. After saving back to .docx or .xlsx, the file opens in Microsoft Office without new damage.

The fourth check is the one people skip. It’s also the one that bites when a document goes back to someone who uses Word.

Suite-by-Suite: What Happens to Your Files in Each Free Office Alternative

LibreOffice

LibreOffice is the default suggestion for good reason. It’s free, it installs on your computer, and it runs on modest hardware. On Windows 10 or 11, the official requirements are 256 MB of RAM (512 MB recommended) and up to 1.5 GB of disk space. It also runs on macOS 11 or newer and on Linux. The current stable release on the download page is LibreOffice 26.8. A volunteer answering on Microsoft’s own community forum called it a free option with pretty good Office compatibility.

Macros are where the LibreOffice vs Microsoft Office gap is widest. LibreOffice’s help says that, with a few exceptions, the two can’t run the same macro code. It also says that if you edit only the normal content and save back to a Microsoft format, the VBA macros will still run in Office afterwards. You can switch on partial VBA support, but LibreOffice describes it as not complete and says you may need to edit the code. Older files are worth checking too: one bug report describes a 2003-era .xls file opening blank with no error message.

OnlyOffice

OnlyOffice Desktop Editors is free, open source, works offline, and runs on Windows, macOS and Linux. Its developers describe it as fully compatible with .docx, .xlsx and .pptx. Treat that as the vendor’s claim, not an independent result. The practical reason it’s often recommended for Microsoft files is the direct editing described above. One Reddit user put it simply: if you really need compatibility with MS, try OnlyOffice.

It has two catches. First, its macros are written in JavaScript, and its own documentation says Microsoft macros are not compatible without converting them, either by hand or with an AI plugin available from version 9.0. Second, it asks more of your computer: a dual-core 2 GHz processor, 2 GB of RAM and 2 GB of free disk space on Windows. OnlyOffice adds that these figures apply to the simplest files.

WPS Office

WPS feels the most like Microsoft Office. The company says its free plan can open, edit and save common Microsoft formats on Windows, Mac, Linux, Android and iOS, and advises testing complex files before switching. Its own compatibility guide admits that WPS doesn’t support VBA. Macros in an Excel file stop working, though the data itself isn’t affected.

The bigger question with WPS Office free is what “free” currently means. WPS’s own blog confirms that the free version shows ads, and that on Android the only official way to remove them is paying for Premium. In a November 2025 Reddit thread, the original poster said WPS was now asking them to upgrade before they could do anything. Other commenters described editing tools locking and saving being blocked. One commenter said it was still free. Those are individual reports, not proof about every install, but they’re reason enough to check before you rely on it.

Google Docs

Google Docs vs Word is less of a straight swap than people expect. The good news is that you can upload a Word or Excel file and edit it directly, with changes saved in the original Office format. Converting to a Google Doc is optional and makes a separate copy. That covers .doc, .docx, .xls, .xlsx, macro-enabled .xlsm and PowerPoint files.

The limits come from Google itself. Password-protected files open in view-only mode. Files from before Office 2007 get saved in a newer format. As covered above, some features may be lost or altered when you edit. Very large files can also fail to save back as Office files. It’s a strong choice for sharing and co-editing, but it runs in a browser, so you need a working connection unless you’ve set up offline access in advance.

SoftMaker FreeOffice

FreeOffice is the least talked-about option and deserves a look. SoftMaker says FreeOffice 2024 is free for personal and business use on Windows, Mac and Linux. It lets you choose between a ribbon layout and classic menus, and its spreadsheet app has more than 430 built-in functions. SoftMaker also calls it seamlessly compatible with Word, Excel and PowerPoint, which again is the vendor’s own claim. One Reddit commenter said the free version does fine for 90% of users. That’s one person’s estimate, not a measured figure.

Microsoft 365 for the web

Microsoft’s own free option is the free web version of Word, Excel and PowerPoint. As a free user you get web versions only, 5 GB of OneDrive storage, security updates but no new features, and no technical support. Excel for the web can’t create, run or edit VBA macros. It can open a workbook that contains them, though, and the macros stay in the file. In Word for the web, password-protected documents open read-only. Because it’s Microsoft’s own engine, it’s the obvious tool for quick edits to a file that will go back to Word users. The trade-off is that you’re working in a browser with limited cloud storage.

Free Office Suites Compared: Which One Opens Your Files Best?

The table pulls the findings above into one view. Each cell comes from the sources linked in the suite-by-suite section, so check those for the exact wording.

Reading across the rows, no suite wins on everything. The analysis points to a split. If you need something that installs on your computer and works offline, the choice is between LibreOffice, OnlyOffice and FreeOffice. OnlyOffice’s direct-editing design gives it the strongest claim for complex Microsoft files, and LibreOffice is the lighter install for an older PC. If your files need to look exactly as Microsoft made them and a browser is fine, Microsoft’s free web apps take away the translation problem. WPS’s compatibility may be good, but its free tier has become the least predictable part of this comparison.

When You Still Need Microsoft Office (and No Free Suite Will Do)

Some files are worth keeping inside Microsoft’s own software. Taken together, the documentation above suggests these are the cases where a free suite is more likely to cost you time than save money:

• Excel files that run on VBA macros. LibreOffice’s support is incomplete, OnlyOffice and WPS can’t run VBA as it is, and Excel for the web can’t run macros at all. Opening the file to read the numbers is fine. Relying on the automation isn’t.
• Workbooks that pull live data through Power Query or external connections. WPS lists these as things that won’t run directly outside Excel, together with add-ins and pivot tables that depend on outside data.
• Heavily designed Word templates. University or company templates full of text boxes, section-specific headers, cross-references or reference-manager citations fall into the categories flagged above and in the bug reports.
• Documents you’ll pass back and forth with Word users who won’t accept any layout change. WPS’s own guide lists this as a reason to keep Office for those particular files.
• Presentations built on advanced PowerPoint animations such as Morph transitions or 3D models, which WPS warns may be downgraded or dropped.

For the first two cases especially, Microsoft 365 or a school- or employer-provided licence is the practical answer. WPS’s own review suggests students check whether their institution already provides Microsoft 365. This is also a better idea than it sounds: keep Office, or its free web version, for the one or two file types that need it, and use a free suite for everything else.

Which Free Office Suite Should You Actually Use?

The suggestions below are a synthesis of the evidence above, not a ranking any single source gives. Match them to the files you actually handle:

• You mainly write essays, letters and CVs, and your laptop is older or low on memory. LibreOffice is the lightest full desktop suite here, and FreeOffice is worth trying if you prefer a ribbon layout like Word’s.
• You receive complex .docx and .xlsx files from a school, client or employer and send them back. OnlyOffice is the strongest candidate as long as your computer meets its 2 GB RAM requirement. Still run the four checks on a real file first.
• You co-edit with classmates or colleagues and are usually online. Google Docs, which edits the Office file in place, is the natural free word processor for shared work.
• You only occasionally need to make a quick edit to a file that must stay exactly as Word made it. Microsoft’s free web apps avoid any translation, provided the file isn’t password-protected and doesn’t depend on macros.
• Your spreadsheets depend on macros or live data connections. Keep Microsoft Office for those files.

If you’re weighing a free office suite for Windows that works fully offline and stays free, that leaves LibreOffice, OnlyOffice and FreeOffice. Based on the current reports, WPS belongs on that list only after you’ve confirmed your version still edits and saves without paying.

Before You Commit: Install, Test, and Check Your Real Files

Switching is low-risk if you check before you rely on it. Don’t overwrite the only copy of an important file in a new suite. Once it’s saved back, any layout damage is baked in.

1. Download from the official site only. Use the LibreOffice download page, OnlyOffice’s desktop download page, freeoffice.com or WPS’s official download centre. WPS itself advises against third-party download sites, and that applies to any free office software download.
2. Copy your three hardest files. Choose your most complex Word document, your most formula-heavy spreadsheet and your most animated presentation. WPS’s guide suggests exactly this three-file test. Work only on the copies.
3. Open each copy and compare it with the original. Look at page breaks, headers, tables of contents, fonts, formula results and chart data.
4. Save back to .docx, .xlsx or .pptx, then reopen. Ideally, reopen it in Microsoft Office or the free web version so you see what the recipient will see.
5. If you choose LibreOffice, set Microsoft formats as the default. Its help explains how to pick the default save format for each document type in the Load/Save – General options, so files don’t quietly save as OpenDocument.

If all three copies pass, you’ve found your suite. If one fails, you now know which file type to keep in Microsoft’s software.

The Bottom Line

Free suites handle everyday Word and Excel files well, but macros, live data connections and heavily designed templates are where they fall short. The single most useful step is opening copies of your three hardest files in your chosen suite, then saving and reopening them before you switch. Skip that test and the first sign of trouble may be a broken layout on someone else’s screen, sent under your name.

Frequently Asked Questions

Is it legal to use Microsoft Word and Excel for free?

Yes. Microsoft offers free web versions of Word, Excel and PowerPoint to anyone with a Microsoft account, plus 5 GB of OneDrive storage. The installed desktop apps still need a paid subscription or licence.

Will LibreOffice delete the macros in my Excel file?

Not if you leave them alone. LibreOffice’s help says that if you edit only the content and save back to a Microsoft format, the VBA macros run in Office afterwards. You can also choose to remove them when you load or save the file.

Does Google Docs turn my Word file into a Google Doc?

Not unless you choose to convert it. Office editing saves your changes in the original format, and converting creates a separate copy. Password-protected files open in view-only mode.

Which free suite suits an old laptop with little memory?

LibreOffice asks for 256 MB of RAM, with 512 MB recommended, and up to 1.5 GB of disk space on Windows. OnlyOffice asks for 2 GB of each, and says those figures apply to its simplest files.