> For the complete documentation index, see [llms.txt](https://docs.helmut.de/helmut4-releases/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.helmut.de/helmut4-releases/v4.11.0/helmut4-components/streamdesigner/wildcards/file-related-wildcards-5/file-md5.md).

# File MD5 ?

This wildcard will be replaced by the MD5 hash of a specified file. The wildcard is used in the following way:

* {file.md5.?}
* For the following input (?) --> R:\Users\Administrator\Pictures\helmut-IO.ico
* The output is going to be --> a3cca2b2aa1e3b5b3b5aad99a8529074 \[MD5 hash]

{% hint style="info" %}
Ensure that the render node or server has access to file. If the the wildcard is on a server-side stream, the streams container needs to have access to the file path.
{% endhint %}

{% hint style="warning" %}
Generating an MD5 hash will take some time, as it is a CPU-intensive task.
{% endhint %}