MAT2
MAT2 (Metadata Anonymisation Toolkit 2) removes embedded metadata from images, PDFs, audio files, office documents, and more. It runs as a CLI tool or as a file-manager extension for Nautilus and Dolphin on Linux.
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ExifTool
ExifTool is a long-standing Perl library and command-line tool for reading, writing, and erasing metadata across an exceptionally wide range of file formats, including JPEG, RAW camera formats, PDF, video, audio, and Office documents.