Thumbsplus Webp [better] File

: Open ThumbsPlus and navigate to Options →right arrow File Mask / Associations .

To fix this, you need to help ThumbsPlus recognize the file extension. How to Add WebP Support to ThumbsPlus thumbsplus webp

Note: Requires the proprietary ThumbsPlus DB schema, which may change between versions. Always backup first. : Open ThumbsPlus and navigate to Options →right

: Navigate to your WebP folder, select the files, right-click, and choose Thumbnail > Rebuild (or press F5 ). Method 2: Utilizing DirectShow or Total Commander Plugins select the files