Extensions: 'X'
| Format | Description | Author | File / Link |
|---|---|---|---|
| X | DirectX SDK & resources | Microsoft | LINK |
| Microsoft DirectX File Format Specification Version 1.13 (MSWord) | Microsoft | Download | |
| X3D | Xara 3D (X3D) file format information | Bastiaan van der Wulp | LINK |
| XA | Maxis XA Audio File Format Description | Valery V. Anisimovsky | Download |
| XANN | XANN Packer format | Asle / ReDoX | Download |
| XBE | Xbox XBE File Format v0.9 | Download | |
| XBM | X BitMap Format | Download | |
| XCR | XCR Archive File Format | Download | |
| XDOC | Xerox ScanWorX and Textbridge OCR File Format (Word) | Xerox | Download |
| XLS | Microsoft Excel File Format (version 2.1) | Download | |
| OLE Compound File (Structured Storage) format | LINK | ||
| The Chicago Project - GPL Excel project | Charles Wyble | LINK | |
| Microsoft Excel File Format (versions 2, 3, 4, 5, 95, 97, 2000, XP) | Daniel Rentz | Download | |
| Java Excel API | LINK | ||
| Microsoft Excel Binary File Format (unknown version) | Mark O'Brien | Download | |
| VB class to write an Excel BIFF 2.1 spreadsheet directly | Paul Squires | Download | |
| Microsoft Office 97 Excel chart file format | Microsoft Corp. | Download | |
| Microsoft Office 97 Excel file format | Microsoft Corp. | Download | |
| OpenOffice.org's Documentation of the Microsoft Excel File Format Versions 2, 3, 4, 5, 95, 97, 2000, XP, 2003 | Daniel Rentz | Download | |
| Compound File Binary File Format | Microsoft Corporation | LINK | |
| XM | XM Module Format Description (with corrections) | Mr H/Triton | Download |
| Errors in the XM format documentation | Zvika Ben-Haim | Download | |
| XMI | MOF 2.0/XMI Mapping Specification, v2.1 | Download | |
| XML | Extensible Markup Language (XML) 1.0 | LINK | |
| XMS | XMS-Tracker Format | Download | |
| eXtended Memory Specification (XMS), ver 3.0 | Microsoft Corporation | Download | |
| XPM | X PIxMap Format definition (Acrobat) | Arnaud le Hors | Download |
| XWD | X Window Dump files | Download | |
| XY3 | XyWrite xy3 and xy4 formats & information | Carl L. Distefano, Robert J. Holmgren | LINK |
| XYZ | RM2k XYZ Graphics Format | Kevin Gadd aka "Janus/Kaimu" | Download |
How to help
If you have any better information or if you find problems with these files or links please .