ZIP Archive (ZIP) bundles multiple files using DEFLATE or Store compression with a central directory index, supported natively on every major operating system. ARJ file (ARJ) stores data in the ARJ format. This extracts the document from the archive so it can be opened directly. Metadata such as creation date and embedded colour profiles is preserved where the target format supports it. The result is a standard ARJ file readable by any compatible application. 1converter handles ZIP-to-ARJ conversion server-side: files are uploaded over HTTPS, processed on isolated cloud infrastructure, and the converted output is available for download for 24 hours before automatic deletion. No account is required for standard conversions.