---
name: "mat"
section: "1"
platform: "linux"
package: "mat"
version: "0.6.1-4"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/mat"
---

# mat(1)

Metadata Anonymisation Toolkit

## NAME

MAT - Metadata Anonymisation Toolkit

## SYNOPSIS

**mat** \[*options*\] *files*

- **mat-gui**

  ## DESCRIPTION

The **Metadata Anonymisation Toolkit** is a lib (with a CLI and a GUI) created to anonymise file's **metadata**. In essence, metadata answer who, what, when, where, why, and how about every face of the data that are being documented. They can be a **risk for privacy**.

## OPTIONS

- **-h**, **--help**

  show this help message and exit

- **-a**, **--add2archive**

  Add to outputed archive non-supported filetypes

- **-b**, **--backup**

  Keep a backup copy

- **-c**, **--check**

  Check if a file is free of harmful metadatas

- **-d**, **--display**

  List all the harmful meta of a file without removing them

- **-l**, **--list**

  List all supported fileformat

- **-L**, **--low-pdf-quality**

  Reduced the produced PDF size and quality

- **-v**, **--version**

  Display version and exit

## EXAMPLES

- **mat --display** mydocument.pdf

  Display the mydocument.pdf's harmful metadata

- **mat --check \*.jpg**

  Check all the jpg images from the current folder

## NOTES

MAT **only process metadata**, it does **not** handle file data. Blame yourself if you are traced back because of the data of your files. MAT is not perfect: In most of the cases, a forensic expert with a lot of time **can trace back** your document. If you want absolute privacy, use plain-text.

## AUTHOR

Julien (**jvoisin**) Voisin \<julien.voisin@dustri.org\>

## BUGS

MAT does not handle watermaking/tattoos for now. The --low-pdf-quality option may produce heavier PDF for very small files. You should only use it for big files.

## SEE ALSO

**exiftool**(1)