Convert each worksheet to CSV with delimiter choice and a ZIP for multi-sheet workbooks.
XLSX · XLS · ODS→ CSVModerate on device
Spreadsheet and Excel tools
Your spreadsheet has secrets. Some of them are hiding: sheets marked very-hidden, formulas that reference internal ranges, author names and company fields in document properties. These tools parse the workbook package locally, show you what is really inside, and write fresh sanitized outputs — all without your data leaving the browser.
One sheet per CSV, automatic delimiter detection, and a fresh clean workbook as output.
CSV · TSV→ XLSXLight on device
Inventory hidden and very-hidden sheets, hidden rows/columns, defined names, hyperlinks, and comments.
XLSX · XLS · ODS→ Inspection report (on screen)Moderate on device
Inspect core and custom document properties, strip identity fields, and verify the clean export.
XLSX→ XLSXLight on device
Fresh values-only rebuild: no formulas, comments, links, hidden sheets, macros, or document properties.
XLSX · XLS · ODS→ XLSXModerate on device
What people use these for
- Check a workbook for hidden and very-hidden sheets before sending it out
- Export a values-only clean copy with formulas, comments, and links removed
- Remove the author, company, and revision metadata from an .xlsx
- Convert Excel sheets to CSV, or CSV files to a clean workbook
Guides for better results
Learn the format, its privacy risks, and the tradeoffs behind the tools before you export.
Hidden sheets, very-hidden sheets, and what Excel won't show you
A spreadsheet you're about to share can contain entire sheets you can't see, formulas pointing at internal data, and identity metadata. Where Excel hides data and how to audit a workbook before it leaves your hands.
9 min read · Reviewed August 2026
Sanitizing documents before you paste them into an AI tool
AI assistants are useful precisely because you give them your real documents — which is why the documents should be cleaned first. A practical pre-upload routine that runs entirely on your device.
7 min read · Reviewed July 2026