Tagged Image File Format .tif, .tiff image/tiff Full Textual metadata and date Removal of harmful fields with exiftool. None Portable Network Graphics .png image/png Full Textual metadata and date Removal of harmful fields with exiftool. None Jpeg .jpeg, .jpg image/jpeg Partial Comments and exif/photoshop/adobe Removal of harmful fields with exiftool. Canon Raw tags Open Document .odt, .odx, .ods, ... application/opendocument Full A meta.xml file Removal of the meta.xml file. None Office Openxml .docx, .pptx, .xlsx, ... application/officeopenxml Full A docProps folder containings xml metadata files. Removal of the docProps folder None Portable Document Fileformat .pdf application/pdf Full A lot Rendering of the PDF file on a cairo surface with the help of poppler. None Tape ARchive .tar, .tar.bz2, .tar.gz application/x-tar, application/x-gzip, application/x-bzip2 Full Metadata from compressed files, metadata added to them by tar and metadata from the tar itself. Extraction and processing of each file, creation of a new archive, processing of this archive. None Zip .zip application/zip Partial Metadata from compressed files, metadata added to them by zip and metadata from the zip itself. Extraction and processing of each file, creation of a new archive, processing of this archive. Metadata added by zip itself to internal files MPEG Audio .mp3, .mp2, .mp1, .mpa audio/mpeg Full Id3 Removal of harmful fields with exiftool None Ogg Vorbis .ogg audio/vorbis Full Vorbis Removal of harmful fields with mutagen None Free Lossless Audio Codec .flac audio/x-flac Full Flac, Vorbis Removal of harmful fields with mutagen None Torrent .torrent application/torrent Full Torrent specific metadata Remove all the compromizing metadata with a heavily tuned version of the bencode lib by Petru Paled None