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<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>
 
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<div class="caution">
 
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*Metadata Cleaner* works on many file formats, including:
 
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</div>
 
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<p>If, instead of cleaning your own files, you want to sanitize untrusted
documents shared with you by others, you can install
[[<i>Dangerzone</i>|persistent_storage/additional_software/dangerzone]] as
additional software.</p>
 
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<div class="tip">
 
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Removing metadata using *Metadata Cleaner*
 
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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/).
 
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Changes to the document
 
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The author of the document
 
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The model and serial number of the camera used to take a photo
 
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The date and time a photo was taken
 
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The location where a photo was taken
 
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Examples of metadata include:
 
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However, metadata can also be used to deanonymize users and expose private information.
 
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Metadata is "data about data" or "information about information" that is embedded in computer files, usually automatically. Metadata is used to describe, identify, categorize, and sort files.
 
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What is metadata?
 
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[[!toc levels=1]]
 
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[[!meta title="Removing metadata from files"]]
 
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Changes committed
Changes committed 02/24/2025

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