From Digital Confidence:
BatchPurifier Lite is a free lightweight edition of BatchPurifier that supports the cleaning of metadata from multiple JPEG files only. BatchPurifier Lite is able to remove hidden data such as Exif data (including geotag and thumbnail), Photoshop image resources (including IPTC), XMP, comments, and other hidden data while keeping the JPEG image intact and without degrading its quality. This metadata often contains information such as the exact date and time the photograph was taken, the digital camera manufacturer and model, the camera settings and the location (if GPS-enabled camera or mobile phone was used). Furthermore, a thumbnail of the image often exists in the JPEG file, and much image manipulation software fails to update this thumbnail when the original image is modified. The unintentional exposure of this information may compromise your privacy and cause you embarrassment. BatchPurifier Lite inspects and cleans JPEG files, even if they are compressed within ZIP files, thus keeping your privacy and enabling you to share your photos with confidence.