What Most People Miss About Excel Opening ODF Files

Yes, Excel can open ODF files — but only by converting them to .xlsx on import, not by reading them natively. But that conversion silently drops formulas, cell styles, and multi-sheet references unless you know where to look.

The Problem

You get an report.ods from a government agency or EU supplier. You double-click it. Excel launches — then throws up a warning: "The file format and extension don’t match." You click "Yes" anyway. What appears looks *almost* right… until you check row 17 in Sheet2. The SUM formula referencing Sheet1!C5:C12? Gone. Replaced with static values. The bold headers? Now regular font. And the date in D3? Changed from 2024-03-15 to 45365.

This isn’t corruption. It’s Excel’s ODF importer doing its best with incomplete specs — and failing quietly.

Symptom	Cause	Fix
#VALUE! in cells that used =SUMPRODUCT()	ODF’s array formula syntax isn’t mapped to Excel’s	Rebuild formulas manually using Ctrl+Shift+Enter (or dynamic arrays if on 365)
Dates show as serial numbers (e.g., 45365)	Excel misreads ODF date formatting as raw numeric data	Select column → Ctrl+1 → Number tab → Date → choose correct locale
Merged cells split across rows	ODF stores merge ranges differently; Excel imports only top-left value	Use Find & Replace (Ctrl+H) for blank cells → fill down → reapply merge via Home → Merge & Center
Currency symbols missing (€ → just 42,500)	ODF number formats aren’t translated into Excel’s custom format strings	Apply custom format: `\€#,##0.00` to range B2:B11
Sheet names truncated ("Q3 Financials 2024" → "Q3 Financ")	Excel enforces 31-character limit; ODF allows longer names	Rename sheets immediately after import — before saving

The Solution

The cleanest path isn’t double-clicking — it’s using Excel’s built-in Open dialog with explicit format selection. Here’s how:

Launch Excel (don’t open a file first).
Press Alt+F+O — this opens the Open dialog directly.
Navigate to your .ods file. In the file type dropdown at the bottom, select All Files (*.*) — not "OpenDocument Spreadsheet (*.ods)" (that option doesn’t exist in Excel).
Select the file and click Open.
Excel will display the Text Import Wizard — no, seriously. Even for spreadsheets. Click Next twice, then Finish.
Now go to Data → Get Data → From File → From Text/CSV, re-select the same .ods file, and choose Load. Yes — this double-import is intentional. The second pass triggers Excel’s newer ODF parser, which preserves more structure.

After step 6, you’ll see a Power Query Editor window. Don’t close it yet. Click Transform → Detect Data Type. Then go to Home → Close & Load.

The beauty of this approach is that Power Query handles ODF’s XML structure more gracefully than the legacy importer — especially around decimal separators (e.g., German “1.234,56” becomes 1234.56 correctly) and sheet-level metadata.

Before (double-click import)	After (Power Query method)
A1: "Sales Rep" B1: "Q1 Revenue" A2: "Sarah Chen" B2: 124500 B3: #N/A	A1: "Sales Rep" B1: "Q1 Revenue" A2: "Sarah Chen" B2: 124,500.00 B3: 98,230.50
C1: "Region" C2: "EMEA" C3: "APAC" D1: "Date" D2: 45352	C1: "Region" C2: "EMEA" C3: "APAC" D1: "Date" D2: 2024-02-15
No formulas visible. All values static.	=SUM(B2:B10) preserved in E1. Named ranges intact.
Sheet tabs: "Sheet1", "Sheet2", "Sheet3"	Sheet tabs: "Revenue Summary", "Expenses", "Forecast"

Going Further

If you’re processing dozens of ODF files monthly, automate it. Create a Power Query function:

= (FilePath) => 
    let
        Source = OData.Feed("file://" & FilePath, null, [Implementation="2.0"]),
        FirstSheet = Source{0}[Data],
        Promoted = Table.PromoteHeaders(FirstSheet, [PromoteAllScalars=true])
    in
        Promoted

Save it as GetODF, then call it like =GetODF("C:\data\q1-report.ods") in any new query.

Surprising tip: LibreOffice can export ODF files with Excel-compatible named ranges — but only if you enable "Export cell ranges as named ranges" under Tools → Options → LibreOffice Calc → Defaults. This makes Excel’s import retain those names in Formulas → Name Manager.

You can also force Excel to treat ODF as XML: rename report.ods to report.zip, extract content.xml, and load that directly into Power Query with From XML. Works for debugging — but don’t do this routinely.

When NOT to Use This

Don’t use Excel’s ODF importer if your file contains:

Macros written in LibreOffice Basic (they won’t convert — ever),
Conditional formatting based on ODF-specific functions like ISODD() or WEEKDAY(A1;2) with mode 2,
Embedded OLE objects (e.g., linked PDFs or vector diagrams — they’ll appear as broken icons),
More than 100 sheets — Excel truncates at 99 sheets on import, with no warning,
Cell comments with Unicode emoji — these become characters.

And never save back to .ods from Excel. Excel’s export engine writes invalid ODF 1.3 XML that LibreOffice 7.6+ rejects with "Invalid manifest signature" — even though it opens fine in older versions.

Keyboard Shortcuts

Action	Shortcut	Notes
Open File dialog	Alt+F+O	Faster than File → Open menu navigation
Open Format Cells dialog	Ctrl+1	Critical for fixing date/currency after ODF import
Toggle Formula View	Ctrl+` (backtick)	See which cells have real formulas vs. static values post-import
Open Power Query Editor	Alt+A+T	Starts transformation pipeline without going through Data tab
Refresh all queries	Alt+F5	Essential when importing updated ODF batches