OmniPage file
File type: Various data file
Files with the .knnk file extension are associated with OmniPage, optical character recognition software for Microsoft Windows.
A KNNK file is an OmniPage data file rather than a general-purpose document format.
File type category:
Various data file
Date updated: October 2, 2026
The .knnk file extension is associated with OmniPage, software developed by Nuance for recognizing text in scanned documents and images.
A KNNK file belongs to OmniPage's internal or supporting data. Its exact contents and role are not generally documented as a user-editable document format, so the file is normally used by OmniPage together with the other files in its workflow.
KNNK is a legacy OmniPage format and appears to be obsolete or no longer commonly used in current software.
Open a KNNK file on Microsoft Windows with OmniPage. Depending on its role, OmniPage may load the file automatically instead of opening it as a standalone document.
If OmniPage does not recognize the file, it may be an internal supporting file rather than one intended for direct user access.
A KNNK file cannot normally be converted directly because it is an internal OmniPage data file, not a standard document format.
When the associated content is available in OmniPage, open the relevant document there and use OmniPage's export or save options to create a supported output document. Preserve the original KNNK file if the software still requires it.
Software applications that handle other tasks involving knnk files:
Microsoft Windows
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