The CNV file extension is associated with Microsoft Word, a powerful authoring program that gives you the ability to create and share documents by combining a comprehensive set of writing tools with the easy-to-use Microsoft Office Fluent user interface, which is part of Microsoft Office. The *.cnv files were used by various Microsoft Word editions for text conversion files. The .cnv file is basically a DLL dynamic link library used for importing or converting other file formats.
Canvas drawing format used by versions 6 through 8; can contain both vector graphics and raster graphics, but typically includes mainly vector images. Previous versions of Canvas use the .CVS file extension, while later versions use the .CVX extension.
The CNV file extension is associated with Corel WordPerfect, a word processing program, developed by Corel Corporation. Corel Word Perfect is part of Corel Word Perfect Office suite. The .cnv files were used for temporary files in some versions of Corel WordPerfect.