To learn more about how metadata can be used to identify and reveal personal information, see [Behind the Data: Investigating metadata](https://exposingtheinvisible.org/en/guides/behind-the-data-metadata-investigations/).
<p>It is impossible to reliably find and remove all metadata in complex file formats. For example, <i>Microsoft Office</i> documents can contain embedded images, audio, and other files containing their own metadata that Tails cannot remove.</p>
<p>Also, you should save files in simpler formats whenever possible. For example, instead of saving a text document as a .docx file, you can save the document as a plain .txt file.</p>
