Validate real estate catalogue JSON before import or publication. This offline browser app and Node.js CLI check record identifiers, explicit currency codes and land-area units, real calendar dates and source provenance. Missing values are reported separately from invalid values; unconfirmed and synthetic records keep their labels. No exchange rates, prices or verification scores are invented.
Download the source ZIP and open index.html locally, or run the CLI with Node.js 22+. No server, API key, runtime dependencies, analytics or data uploads. ...