CSV vs XLSX vs ODS in 2026: Best Spreadsheet Format for Developers
Last Updated: 23 Feb 2026
Spreadsheets are still everywhere in 2026. From quick data exports and ETL pipelines to enterprise reporting dashboards and open-source analytics tools, developers deal with spreadsheet files almost daily. But one question keeps coming back:
Should you use CSV, XLSX, or ODS?
Each format solves a very different problem. Choosing the wrong one can lead to bloated files, broken internationalization, lost formatting, or painful integrations. This guide breaks down CSV, XLSX, and ODS from a developer’s perspective, focusing on performance, compatibility, automation, and long-term maintainability.
Compare XLSX vs. ODS vs. FODS: The Ultimate Open Format Showdown
Last Updated: 01 Dec, 2025
In the world of spreadsheets, most of us just click “Save” without a second thought. But behind that simple action lies a critical choice: which file format should you use? While the default might be Microsoft Excel’s XLSX, a new era of open-source software has brought powerful alternatives like ODS and FODS into the spotlight.
Choosing the right format isn’t just about compatibility; it’s about data integrity, future-proofing, and accessing advanced features.