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# Metadata Anonymization Toolkit
Thankfully, there is a tool that comprehensively cleans metadata, and it is available as both a [command line interface](/glossary#command-line-interface-cli) and a graphical user interface. The command line version is called `mat2` and is [open-source](https://0xacab.org/jvoisin/mat2), and the graphical version is called [Metadata Cleaner](https://metadatacleaner.romainvigier.fr/) and is also [open-source](https://gitlab.com/rmnvgr/metadata-cleaner/). Both programs are included in [Tails](/tags/tails/) and [Qubes-Whonix](/posts/qubes/#whonix-and-tor) by default.
# Using Metadata Cleaner
Unless you are comfortable with the command line, we recommend Metadata Cleaner - it is using `mat2` under the hood, so has all of the same functionality. Metadata Cleaner is better than Exiftool and other software that removes metadata - see the [comparison docs](https://0xacab.org/jvoisin/mat2/-/blob/master/doc/comparison_to_others.md).
Metadata Cleaner displays metadata that it detects, but "it doesn't mean that a file is clean from any metadata if mat2 doesn't show any. There is no reliable way to detect every single possible metadata for complex file formats." You should clean the file even if no metadata is displayed.
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Multiple photos or videos from the same camera can be tied together in this way, and if the camera is recovered it can be confirmed to be where the files came from. Cheap cameras can be acquired from a refurbished store and used only once for images or videos that require high security.
# Printer Forensics
All modern printers leave invisible watermarks in order to encode information such as the serial number of the printer and and when it was printed. If printed material is scanned, these markings are present in the file. To learn more, see [Revealing Traces in printouts and scans](https://dys2p.com/en/2022-09-print-scan-traces.html) and the Whonix documentation on [printing and scanning](https://www.whonix.org/wiki/Printing_and_Scanning).
# Further Reading