# LibreOffice Accuses Microsoft of Document Lock-In Tactics Open-source office software criticizes Microsoft's restrictive document format policies. - **Source:** [Slashdot](https://brifing.si/source/0f34d58e-1ccd-45a6-ab82-2de4065dc7ad) - **Published:** 2026-07-20 - **Topic:** [Business](https://brifing.si/c/business) - **Original article:** - **On Brifing:** https://brifing.si/s/1bcc61af-718e-459c-8b92-ee5f87de67ba ## Microsoft's Document Strategy Under Fire Italo Vignoli, a founding member of LibreOffice, accuses Microsoft of locking users in with DOCX, XLSX, and PPTX formats. He claims these formats are controlled by Microsoft and serve its interests. Open document formats, in contrast, are transparent and can be used by any application without hidden features. ## Advantages of Open Formats Open document formats can be read and written flawlessly by any software. Vignoli argues they are safer for long-term document preservation. Microsoft's formats, however, may face compatibility issues over time, risking the accessibility of old documents in the future. ## Issues with Third-Party Software Microsoft's document formats may not display correctly in third-party applications. Vignoli says this forces users to rely on Microsoft's products. For example, a PowerPoint presentation might look different in another app, making it harder for users to switch to alternatives. ## Long-Term Document Preservation Risks Vignoli warns that Microsoft's formats pose a risk to long-term document access. The company could drop support for older formats, leaving decades-old files unreadable. Open formats eliminate this risk, ensuring documents remain accessible in the future. ## Microsoft's Monopolistic Approach LibreOffice argues that Microsoft's document formats create a monopoly, limiting user choice and stifling competition. Vignoli calls for the adoption of open standards, allowing users to freely choose their software and preserve their documents securely. ## The Importance of Open Standards Vignoli's criticism highlights the importance of open standards. Microsoft's closed formats trap users in its ecosystem. Open-source alternatives like LibreOffice fight these restrictions. User awareness and preference for open formats are crucial for digital freedom. ## Sources covering this story - https://news.slashdot.org/story/26/07/20/0431217/libreoffice-once-again-slams-microsoft-for-using-lock-in-with-office-files?utm_source=rss1.0mainlinkanon&utm_medium=feed — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._