How to Remove Slide Notes from Multiple Presentation Files

Microsoft PowerPoint® has no out-of-the-box means for removing slide notes (aka speaker notes or presentation notes) from multiple files in batch.

BatchPurifier™ can permanently remove slide notes from multiple files in one go. It can do so for Microsoft PowerPoint® (PPTX; PPTM; PPSX) files and for OpenDocument Presentation files. (ODP)

BatchPurifier™ can also selectively remove other types of hidden data & metadata from multiple types of document, image, and media file formats. It's an offline privacy-oriented desktop application for Windows®.