OpenDocument inside the package
An .ods file unzips into a small set of XML documents: content.xml holds the actual cells and formulas, styles.xml describes formatting, and meta.xml and a manifest round out the package. The structure follows the OpenDocument specification, a vendor-neutral standard designed so that no single company controls the way your spreadsheets are stored. That independence is the format’s founding purpose and the reason public bodies and archivists often prefer it.
Functionally it covers the same ground as any modern spreadsheet: multiple sheets, cells typed as numbers, dates, text or booleans, formulas, named ranges and charts. Calc treats ODS as its native home, so features round-trip faithfully when you stay within the OpenDocument world.
Living alongside XLSX
In practice ODS and XLSX describe overlapping capabilities, and most applications read both. LibreOffice Calc opens and saves either, and recent versions of Excel can import ODS, though the exchange is not always perfect. Formula functions, conditional formatting and chart options occasionally differ between the two ecosystems, so a file converted from one to the other can need a quick check.
Choosing ODS is usually a deliberate stance in favour of an open, stable archival format rather than a feature decision. If your collaborators live in Excel, XLSX may cause less friction; if you value format independence or work in a LibreOffice-centred environment, ODS is the natural default.
Strengths
- A fully open ISO/IEC standard not controlled by any single vendor.
- Native format of LibreOffice and OpenOffice Calc, with faithful round-tripping.
- Holds the full spreadsheet feature set — sheets, formulas, charts and styles.
- A strong choice for long-term archiving and public-sector requirements.
Limitations
- Less ubiquitous than XLSX, so some recipients may expect the Microsoft format.
- Conversion to and from XLSX can disturb formulas, charts or formatting.
- Like XLSX, its richness is lost when flattened to CSV or JSON.
- A handful of advanced Excel features have no exact ODS equivalent.
When to use ODS
Use ODS when you want an open, standards-based spreadsheet, particularly within LibreOffice or OpenOffice or where format independence and archiving matter. If most of your collaborators use Excel, XLSX may exchange more cleanly.
ODS FAQ
- What is an ODS file?
- It is an OpenDocument Spreadsheet — the open-standard spreadsheet format used by default in LibreOffice and OpenOffice Calc, storing sheets, formulas and formatting much as XLSX does.
- Can Excel open ODS files?
- Yes, current versions of Excel can open and save ODS, and LibreOffice Calc handles it natively. Very complex formulas or formatting may shift slightly when crossing between the two formats.
- How do I convert an ODS file to CSV or JSON?
- Morphr converts it in your browser with nothing uploaded, exporting the cell values while dropping formatting and resolving formulas to their results. That gives you plain data ready for another application.