Common documents

Files with abw extension are pretty much certainly documents created and saved using the AbiWord word processor.

Files with chm extension are mainly related to Microsoft compiled HTML help file format. CHM is acronym for Compiled Help Modules.

A djvu file extension is used for a special image and document file format called DjVu. Typically used for image documents because it can achieve much lower file sizes, compared to other image formats with text, such as JPEG.

A docm file extension is used for default macro-enabled document format of latest versions of Microsoft Word. Such documents may contain additional VBA scripts or macros, that enhance some functions of the Word document.

A dot file extension is used by Microsoft Word, a word processor that is distributed as a part of Microsoft Office. A dot file contains document template (predefined document type and format). A dot file extension is used by Microsoft Word 97 to 2003.

A dotx file extension is used for a main open XML document template format of Microsoft Word. Templates are generally used to save predefined look and settings of documents for quick creation of documents that have same look. DOTX format is a successor to previously used DOT format. Some other word processors are also able to open dotx files, however they wont probably use most of the Microsoft Word specific formatting.

Files with edoc extension are usually files that contain electronically certified documents. Popular in Lativa.

A gp4 file extension is associated with Guitar Pro 4, a multi track editor of guitar and bass tablature, which allows you to create whole scores for guitar, bass or other stringed instruments in a few minutes. 

Files with indd extension are associated with Adobe InDesign and used for its default InDesign document format. InDesign is used to create graphically rich documents, brochures and other more sophisticated texts. It was a part of Adobe Creative suite and currently of Adobe Creative Cloud.

Files with key extension can be often found as presentations saved in latest versions of Apple (iWork) Keynote, a professional presentation tool for Mac OS X, macOS and iOS.

Files with lic extension are used by many commercial, trial, or shareware applications to hold information about buyers' license. Application developers use own data formats for license files. License file can be in text, or binary file format, sometimes is also encrypted.

Files with mpp extension can be usually found as plans (projects) made using Microsoft Project project management software program developed by Microsoft.

Files with ods file extension can be nowadays commonly found as spreadsheets saved using Calc program from OpenOffice.org, LibreOffice and perhaps other office productivity bundles that use documents based on OpenDocument Format schema.

Files with opx extension can generally be found as saved organization charts from Microsoft Office, or similar program that uses the same suffix, like OrgPlus.

Files with oxps file extension are documents created in Windows 8/10/11 using the latest version of the Open XML Paper Specification. You can easily view *.oxps files using the pre-installed Windows XPS viewer, but only in the latest versions of Windows. For older versions of Windows, you will need to convert oxps to xps.

A pdf file extension is mainly used for Adobe Portable document format, commonly referred to as PDF. All programs that create some sort of documents or projects offer the possibility to export their format to PDF format. A free PDF viewer (Adobe Reader) is available for download from Adobe website.

Files with pot file extension can be found as PowerPoint templates for version 97 to 2003. Used to quickly create presentations with same layout and settings.

Files with pps extension are presentations from Microsoft PowerPoint presentation software. PowerPoint's PPS slide shows are basically sequences of screens, often used for presentation purposes.   

A ppt file extension is traditionally used for Microsoft PowerPoint presentations. PowerPoint presentation can contain text, pictures, audio or video data. Sometimes also called slide shows.

Files with pptx extension are presentations from modern version of PowerPoint from Microsoft Office / Office 365. PowerPoint slide shows are basically set of screens which can include text, graphic, sounds or videos used for various presentation purposes.

Files with proproj file extension are projects created and saved using the Adobe Premiere Pro software. Contains saved work in progress.

Files with pub extension are in most cases documents created in Microsoft Publisher, a desktop publishing application from Microsoft Office suite. PUB documents are much more complex than common Word files and give more emphasis to design and page layout, rather than actual text.

Files with rtf extension can commonly be found as text files saved in Rich Text Format. Supported by most text editors.

Files with sdw file extension can be most often encountered as text documents from StarOffice and some versions of OpenOffice.org.

Files with snp file extension are most notably known to be snapshots generated from older Microsoft Access databases. Used for viewing purposes only.

Files with tpl extension are traditionally used for template files in many programs. Templates are predefined formats that help to quickly and easily create similar looking documents with same settings.

Files with wpd extension are generally found as documents created and saved in he Corel WordPerfect word processor.

Files with wri file extension can be most often found as old documents that were created and saved in the Microsoft Windows Write text editor that was distributed as a part of Microsoft Windows up to version 95.

Files with xps extension are almost always documents that were exported or printed in Microsoft Windows with the default Microsoft XPS Document Writer virtual printer, for example in MS Office applications. XPS format is Microsoft's much less popular alternative to PDF for fixed layout exchange documents.