> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/build/compression.md).

# Compress or decompress files with Compression in Duaer

In Duaer, Compression defaults to Operation Decompress. Input Binary Field(s) defaults to data. It works on binary on the item, not a host path.
## Decompress a zip

1. Start from an item that already has an archive on a binary field, for example data.
2. Search for Compression and connect it after that node.
3. Leave Operation on Decompress.
4. Input Binary Field(s) defaults to data. Comma-separate multiple fields.
5. Output Prefix defaults to file_. Select Execute step.

To pack files, set Operation to Compress. On current versions Output Format defaults to Zip. Set File Name. Put Output File in Field defaults to data.

Refer to [Work with files and images in Duaer](/data/binary-data.md).
## Questions

### Can Compression in Duaer open a zip path on my Desktop?

No. It reads binary on the item. To load from the host disk, use Read/Write Files from Disk on self-hosted Duaer.