XLSX· Excel spreadsheet auditor
Find what's broken in your spreadsheet. Fix it in one click.
What is XLSX?
XLSX is an excel spreadsheet auditor.
XLSX is a browser-based Excel auditor that shows you exactly what is broken in a spreadsheet and lets you fix it in one click. Open a workbook in your browser and XLSX scans it for broken formulas, error values, hidden sheets, and external links pointing at files you no longer control. Every issue is listed in a plain-English report grouped by sheet, so you can see the full picture before you change anything, then apply a one-click fix to the problems you actually want cleaned up. Privacy is central to the design: your file is never uploaded. The audit runs in your browser, so the workbook never leaves your machine. Scanning is free. Pro-style one-click fixes are a $9 one-time purchase, not a subscription. Built in Boston, MA by founder George Gilmer, founded 2026.
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1Hi, I'm George Gilmer, building XLSX from Boston, MA. It audits Excel files right in the browser - broken formulas, hidden sheets, external links - and fixes them in one click, without ever uploading