Formats
ZIP bundle
The same bundle as a plain .zip, which any computer opens — how to turn it on and how it is read.
With Settings → Export → Bundle as .zip, bundles are plain .zip files instead of .wxrz. The entries are exactly the same — manifest.json, the WXR, options.json, post_content/, uploads/ — so everything on the WXRZ page applies.
Why
A .zip opens with a double click on any computer; .wxrz needs a tool that reads .tar.gz. Choose .zip when people will look inside the file; keep .wxrz when it only travels between sites.
Per export
The setting is the default. The eizport/export ability takes zip: true or zip: false for one export.
How it is written and read
The plugin writes the tar bundle and turns it into a .zip (with ZipArchive, or core’s PclZip), and on import turns a .zip back into a tar before reading it — one code path for both, with the same checks:
- only bundle entries are taken (the manifest, a top-level
.xml,options.json,post_content/*.html, safeuploads/files); - the uncompressed size counts against the same 512 MB limit.
Telling bundles from Playground files
Both end in .zip. A bundle has manifest.json and no blueprint.json; a Playground .zip has blueprint.json. The importer and the Copies list tell them apart that way.