Issue

Some Microsoft Word docx files uploaded to AEM Assets have thumbnails that are blurry and illegible.

Environment

AEM 6.x

Cause

This is a known product limitation.

Resolution

AEM Assets does not generate docx thumbnails, instead it extracts them directly from the docx file archive.  If Microsoft Word happens to generate a faulty or blurry thumbnail, the same is carried over to AEM.

As a workaround, a command line tool could be employed to generate thumbnails.  For example:
https://launchpad.net/ooo-thumbnailer

The tool could be applied via the Command Line workflow process step and the configuration for this would be similar to Image Magick.

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