| .ASHX | Microsoft Corporation | Webfiler | ASP.NET Web Handler File | LibreOffice | The Document Foundation |
| .ATT | Unknown Developer | Webfiler | Web Form Post Data File | LibreOffice | The Document Foundation |
| .AXD | Microsoft Corporation | Webfiler | ASP.NET Web Handler File | LibreOffice | The Document Foundation |
| .B | Rockstar Games | Spilfiler | Grand Theft Auto 3 Saved Game File | LibreOffice | The Document Foundation |
| .CF | Proofpoint, Inc. | Indstillingsfiler | Sendmail Configuration File | LibreOffice | The Document Foundation |
| .CSV | Unknown Developer | Datafiler | Comma Separated Values File | LibreOffice | The Document Foundation |
| .CVS | Unknown Developer | Datafiler | Comma Separated Values File | LibreOffice | The Document Foundation |
| .DBF | dBase, LLC | Databasefiler | Database File | LibreOffice Base | The Document Foundation |
| .DIZ | Unknown Developer | Tekstfiler | Description In Zip File | LibreOffice Calc | The Document Foundation |
| .DOC | Microsoft Corporation | Tekstfiler | Microsoft Word Document (before The 2007 Version) | LibreOffice | The Document Foundation |
| .DOCX | Microsoft Corporation | Tekstfiler | Microsoft Word Open XML Document | LibreOffice | The Document Foundation |
| .FAQ | The Document Foundation | 3D-billedfiler | Frequently Asked Questions Document | LibreOffice | The Document Foundation |
| .HWP | Hancom, Inc. | Tekstfiler | Hanword Document | LibreOffice | The Document Foundation |
| .ICF | Zoom Telephonics | Sikkerhedskopifiler | Zoom Router Configuration File | LibreOffice | The Document Foundation |
| .JNLP | Oracle Corporation | Webfiler | Java Web Start File | LibreOffice | The Document Foundation |
| .LOL | Apple | Udviklerfiler | LOLCODE Source Code FIle | LibreOffice | The Document Foundation |
| .LST | Unknown Developer | Tekstfiler | Data List | LibreOffice | The Document Foundation |
| .LYT | Adminsoft | Datafiler | Adminsoft Document Layout File | LibreOffice | The Document Foundation |
| .MAB | Mozilla | Ikke Almindelige Filer | Mozilla Address Book | LibreOffice | The Document Foundation |
| .MAN | Unknown Developer | Tekstfiler | Unix Manual | LibreOffice | The Document Foundation |
| .ME | Unknown Developer | Ikke Almindelige Filer | Temporary Delete Me File | LibreOffice | The Document Foundation |
| .NFO | Microsoft Corporation | Systemfiler | System Information File | LibreOffice | The Document Foundation |
| .NOW | The Document Foundation | Tekstfiler | Readme Text Document File | LibreOffice | The Document Foundation |
| .ODB | Various Developers | Databasefiler | OpenDocument Database | LibreOffice | The Document Foundation |
| .ODF | Oracle Corporation | Ikke Almindelige Filer | OpenDocument Formula | LibreOffice | The Document Foundation |
| .ODG | Apache Software Foundation | Vektorbilledfiler | OpenDocument Graphic File | LibreOffice | The Document Foundation |
| .ODM | Open Source | Tekstfiler | OpenDocument Master Document | LibreOffice | The Document Foundation |
| .ODP | Oracle Corporation | Datafiler | OpenDocument Presentation | LibreOffice | The Document Foundation |
| .ODS | Oracle Corporation | Regnearksfiler | OpenDocument Spreadsheet | LibreOffice Calc | The Document Foundation |
| .ODT | Oracle Corporation | Tekstfiler | OpenDocument Text Document | LibreOffice | The Document Foundation |
| .OOT | Apache HTTP Project Management Committee | Datafiler | Apache OpenOffice Text Document | LibreOffice | The Document Foundation |
| .OTG | Apache Software Foundation | Vektorbilledfiler | OpenDocument Graphic Template | LibreOffice | The Document Foundation |
| .OTP | Oracle Corporation | Datafiler | OpenDocument Presentation | LibreOffice | The Document Foundation |
| .OTS | Apache Software Foundation | Regnearksfiler | OpenDocument Spreadsheet Template | LibreOffice | The Document Foundation |
| .OTT | Apache Software Foundation | Tekstfiler | OpenDocument Document Template | LibreOffice | The Document Foundation |
| .OXT | Sun Microsystems | Plug-in-filer | Apache OpenOffice Extension | LibreOffice | The Document Foundation |
| .PAGES | Apple | Tekstfiler | Apple Pages Document | LibreOffice | The Document Foundation |
| .PDF | Adobe Systems Incorporated | Sideopsætningsfiler | Portable Document Format File | LibreOffice | The Document Foundation |
| .POTX | Microsoft Corporation | Datafiler | PowerPoint Open XML Presentation Template | LibreOffice Impress | The Document Foundation |
| .PPTX | Microsoft Corporation | Datafiler | PowerPoint Open XML Presentation | LibreOffice | The Document Foundation |
| .PSW | Microsoft Corporation | Ikke Almindelige Filer | Windows Password Reset Disk File | LibreOffice | The Document Foundation |
| .PUB | Microsoft Corporation | Sideopsætningsfiler | Microsoft Publisher Document | LibreOffice | The Document Foundation |
| .PWI | Microsoft Corporation | Tekstfiler | Pocket Word Document | LibreOffice | The Document Foundation |
| .README | The Document Foundation | Tekstfiler | Readme Text Document File | LibreOffice | The Document Foundation |
| .RPT | SAP | Datafiler | Crystal Reports File | LibreOffice | The Document Foundation |
| .RTX | The Document Foundation | Tekstfiler | Rich Text Document | LibreOffice | The Document Foundation |
| .SCRIPT | Unknown Developer | Eksekverbare filer | Generic Script File | LibreOffice | The Document Foundation |
| .SDA | Oracle Corporation | Vektorbilledfiler | StarOffice Drawing | LibreOffice | The Document Foundation |
| .SDC | Stardock Corporation | Sikkerhedskopifiler | Stardock Central Download Archive | LibreOffice | The Document Foundation |
| .SDD | Programming Sunrise | Datafiler | Smart Diary Suite Data File | LibreOffice | The Document Foundation |
| .SDP | Oracle Corporation | Datafiler | StarOffice Presentation File | LibreOffice | The Document Foundation |
| .SDV | Pinnacle Systems Inc. | Videofiler | Studio DV Project File | LibreOffice | The Document Foundation |
| .SDW | LizardTech | GIS-filer | MrSID World File | LibreOffice | The Document Foundation |
| .SHT | The Document Foundation | Webfiler | HTML File With Server Side Includes | LibreOffice | The Document Foundation |
| .SMF | Oracle Corporation | Tekstfiler | StarMath Formula File | LibreOffice | The Document Foundation |
| .SMS | Sega | Spilfiler | Sega Master System ROM | LibreOffice | The Document Foundation |
| .SSC | Microsoft Corporation | Udviklerfiler | SourceSafe Status File | LibreOffice | The Document Foundation |
| .STC | Adobe Systems Incorporated | Webfiler | Contribute Connection Key File | LibreOffice | The Document Foundation |
| .STD | Oracle Corporation | Vektorbilledfiler | Apache OpenOffice Drawing Template | LibreOffice | The Document Foundation |
| .STI | Oracle Corporation | Datafiler | StarOffice Presentation Template | LibreOffice | The Document Foundation |
| .STM | Microsoft Corporation | Datafiler | Exchange Streaming Media File | LibreOffice Calc | The Document Foundation |
| .STW | Oracle Corporation | Tekstfiler | StarOffice Document Template | LibreOffice | The Document Foundation |
| .SVM | Star Division | Rasterbilledfiler | StarView Metafile | LibreOffice | The Document Foundation |
| .SXC | Sun Microsystems | Regnearksfiler | StarOffice Calc Spreadsheet | LibreOffice Calc | The Document Foundation |
| .SXD | ESRI | GIS-filer | ArcScene Document | LibreOffice | The Document Foundation |
| .SXG | Oracle Corporation | Tekstfiler | Apache OpenOffice Master Document | LibreOffice | The Document Foundation |
| .SXI | Oracle Corporation | Datafiler | StarOffice Impress Presentation | LibreOffice | The Document Foundation |
| .SXW | Oracle Corporation | Tekstfiler | StarOffice Writer Document | LibreOffice | The Document Foundation |
| .TSV | Unknown Developer | Datafiler | Tab Separated Values File | LibreOffice | The Document Foundation |
| .UOF | The Document Foundation | Tekstfiler | Uniform Office Document | LibreOffice | The Document Foundation |
| .VSD | Microsoft Corporation | Vektorbilledfiler | Microsoft Visio Drawing File | LibreOffice | The Document Foundation |
| .VSDX | Microsoft Corporation | Vektorbilledfiler | Visio Drawing | LibreOffice | The Document Foundation |
| .WDB | Microsoft Corporation | Databasefiler | Microsoft Works Database | LibreOffice | The Document Foundation |
| .WK1 | IBM | Datafiler | Lotus Worksheet | LibreOffice Calc | The Document Foundation |
| .WPS | Kingsoft | Tekstfiler | Kingsoft Writer Document | LibreOffice | The Document Foundation |
| .WRI | Microsoft Corporation | Tekstfiler | Microsoft Write Document | LibreOffice | The Document Foundation |
| .XLS | Microsoft Corporation | Regnearksfiler | Microsoft Excel 97 To 2003 Spreadsheet | LibreOffice Calc | The Document Foundation |
| .XLSX | Microsoft Corporation | Regnearksfiler | Microsoft Excel Open XML Spreadsheet | LibreOffice | The Document Foundation |
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