Excel Image Downloader is an app that lets you download all the pictures in Excel files that are linked. It searches through all the file's cells and finds links, then downloads the picture. You can choose to download pictures in .jpg; .png format or let it do the job by selecting an auto mode. The app has some other nice features like compressing the pictures and packing them to the ZIP archive after the download and more. Expect bugs as the alpha version was made in a couple of hours and the final version in 3 days. The app is in the Polish language only.

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You can download the executable and source code.