Open XLSX as ZIP
XLSX spreadsheets are ZIP-based document packages with XML and workbook media.
Before you open it
Archive files can hide many files inside one download. Some are simple document bundles; others are app packages or disk images. For private files, the safest first step is to identify the format and inspect it locally.
Why local processing matters
Uploading an archive can expose every file inside it. A browser-local workflow helps you avoid handing personal documents, backups, photos, contracts, or source code to an unknown server.
Common issues
- The archive is incomplete.
- The file is password protected.
- The file is part of a split archive.
- The browser tool does not support the compression method.