When you receive untrusted documents, for example, email attachments, *[Dangerzone](https://dangerzone.rocks/)* allows you to convert them into safe PDFs before opening.
Tails also includes [[*Metadata Cleaner*|doc/sensitive_documents/metadata]] to clean files, but the use cases for *Dangerzone* and *Metadata Cleaner* are very different.
*Dangerzone* requires a lot of memory in the computer and space in your Persistent Storage because it relies on [[!wikipedia Containerization (computing) desc="software containers"]] to manipulate dangerous files securely.