SheetSense — Spreadsheet Error Detector

About

88% of spreadsheets contain errors. Is yours one of them?

SheetSense is a Chrome extension that detects hidden errors in your Google Sheets and Excel Online spreadsheets — the problems your spreadsheet never shows you.

Click "Scan Sheet" and get a complete health report in under 3 seconds. No data leaves your browser.

🔍 WHAT SHEETSENSE DETECTS

▸ Formula Inconsistencies — If 99 rows use SUM but one row has a hardcoded number, SheetSense catches it instantly.

▸ Silent Overwrites — When someone accidentally types over a formula and replaces it with a static value, you'll know immediately.

▸ #REF!, #DIV/0!, #NAME? Errors — Every broken formula reference is flagged with a clear explanation and fix suggestion.

▸ Circular References — Self-referencing formulas that can break your entire sheet.

▸ Mixed Data Types — Text in a number column silently breaks SUM and AVERAGE. SheetSense finds every mismatch.

▸ Data Gaps — Empty rows in the middle of your data that break formulas assuming contiguous ranges.

▸ Critical Input Cells — Cells referenced by 10+ formulas are flagged as high-impact. One accidental edit could cascade errors everywhere.

▸ Complex Formula Warnings — Mega-formulas and magic numbers get flagged with suggestions to simplify.

▸ Duplicate Headers — Column headers that repeat and can break VLOOKUP/INDEX-MATCH.

📊 HEALTH SCORE

Every scan produces a 0-100 health score with letter grade (A through F) and a breakdown by severity — Critical, High, Medium, and Low. Know at a glance if your spreadsheet data is trustworthy.

⚡ HOW IT WORKS

1. Install SheetSense (takes 3 seconds)
2. Open any Google Sheet or Excel Online spreadsheet
3. Click "Scan Sheet" in the SheetSense panel
4. Get your health score and prioritized issue list instantly

🔒 PRIVACY FIRST

Your spreadsheet data never leaves your browser. All analysis runs locally using rule-based detection. No data is sent to any server. No AI, no cloud processing, no tracking.

🌐 SUPPORTED PLATFORMS

• Google Sheets
• Excel Online (OneDrive, SharePoint)