What 'portable' actually means
Portability means four things. We hold to all of them.
Portability isn't a feature we added. It's a constraint we designed around. Your data lives in a single JSON file that any developer can read without documentation, any tool can process without a schema, and any import flow can ingest without a conversion step.
Open the file. You can read it. No binary blobs, no proprietary markup.
Valid JSON. Parses in any language you care to use.
One file holds every piece of content on your site. Images reference by name.
Re-import the file. Get your site back byte-for-byte.