ZIM (file format)

The ZIM file format is an open file format that stores wiki content for offline usage.[1] Its primary focus is the contents of Wikipedia and other Wikimedia projects.

The format allows for the compression of articles, features a full-text search index and native category and image handling similar to MediaWiki, and the entire file is easily indexable and readable using a program like Kiwix – unlike native Wikipedia XML database dumps.

In addition to the open file format, the openZIM project provides support for an open-source ZIM reader called Kiwix.

ZIM stands for "Zeno IMproved"[2][3], as it replaces the earlier Zeno file format. Its file compression uses LZMA2, as implemented by the xz-utils library. The openZIM project is sponsored by Wikimedia CH, and supported by the Wikimedia Foundation.

See also


  1. "openZIM project wiki". Retrieved 4 April 2012.
  2. "Zeno File Format". openZIM.org. Retrieved 10 April 2012.
  3. ".ZIM File". FILExt. Retrieved 10 April 2012.
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