Portable Network Graphics .png image/png full textual metadata + date removal of harmful fields is done with hachoir Jpeg .jpeg, .jpg image/jpeg partial comment + exif/photoshop/adobe removal of harmful fields is done with hachoir Canon Raw tags : http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/CanonRaw.html Open Document .odt, .odx, .ods, ... application/opendocument full a meta.xml file removal of the meta.xml file Office Openxml .docx, .pptx, .xlsx, ... application/officeopenxml full a docProps folder containings xml metadata files removal of the docProps folder Portable Document Fileformat .pdf application/pdf full a lot rendering of the PDF file on a cairo surface with the help of poppler in order to remove all the internal metadata. For now, cairo create some metadata. They can be remove if you install either exiftool, or python-pdfrw. The next version of python-cairo will support PDF metadata. Tape ARchive .tar, .tar.bz2, .tar.gz application/x-tar, application/x-gzip, application/x-bzip2 full metadata from the file itself, metadata from the file contained into the archive, and metadata added by tar to the file at then creation of the archive extraction of each file, treatement of the file, add treated file to a new archive, right before the add, remove the metadata added by tar itself. When the new archive is complete, remove all his metadata. Zip .zip application/zip partial metadata from the file itself, metadata from the file contained into the archive, and metadata added by zip to the file when added to the archive. extraction of each file, treatement of the file, add treated file to a new archive. When the new archive is complete, remove all his metadata metadata added by zip itself to internal files MPEG Audio .mp3, .mp2, .mp1, .mpa audio/mpeg full id3 removal of harmful fields is done with hachoir Ogg Vorbis .ogg audio/vorbis full Vorbis removal of harmful fields is done with mutagen Free Lossless Audio Codec .flac audio/x-flac full Flac, Vorbis removal of harmful fields is done with mutagen Torrent .torrent application/torrent full torrent remove all the compromizing metadata with a heavily tuned version of the bencode lib by Petru Paled