SheetSense — Spreadsheet Error Detector for Google Sheets & Excel Online
Now available for Google Sheets & Excel Online

Your spreadsheets have errors.
Find them before they cost you.

SheetSense detects formula inconsistencies, silent overwrites, and structural issues in real time — the problems spreadsheets never show you.

🛡️ No data leaves your browser ⚡ Scans in under 3 seconds 📊 Works on any spreadsheet
docs.google.com/spreadsheets/d/1a2b3c.../edit
ABCD
1 ProductQ1 SalesQ2 SalesTotal
2 Widget A15,00018,000=B2+C2
3 Widget B22,00025,000=B3+C3
4 Widget C8,000#REF!19,000
5
6 Widget DN/A30,000=B6+C6
7 TOTAL=SUM(B2:B6)=SUM(C2:C6)=SUM(D2:D6)
SheetSense
42 Grade D
Health Score
2 Critical 1 High 3 Medium
C4 Formula Error
#REF! error — VLOOKUP references column 5 in a 3-column range
💡 Check if Sheet2 columns were deleted
D4 Formula Overwritten
Formula =B4+C4 replaced with static value "19,000"
💡 Restore original formula or verify manual entry
Col B Mixed Types
Column B has "N/A" text mixed with numbers — SUM may be wrong
💡 Replace text with 0 or use SUMIF to exclude

Every error your spreadsheet hides from you

SheetSense runs 15+ rule-based checks that catch the mistakes humans miss — all without sending your data anywhere.

🔴

Formula Inconsistencies

If 99 rows use a SUM formula but one row is a hardcoded number, SheetSense catches it instantly.

⚠️

Silent Overwrite Detection

When someone accidentally types over a formula, replacing it with a static value, you'll know immediately.

📊

Structural Health Score

Every sheet gets a 0-100 health score with a breakdown by severity. Know at a glance if your data is trustworthy.

🔤

Mixed Data Type Alerts

Text in a number column silently breaks SUM and AVERAGE. SheetSense finds every type mismatch.

🛡️

Critical Cell Protection

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

🧮

Complexity Warnings

Mega-formulas, magic numbers, and circular references get flagged with clear suggestions to simplify.

Three seconds to trust your data

1

Install the extension

One click from the Chrome Web Store. No signup required for the free tier.

2

Open any spreadsheet

Works on Google Sheets and Excel Online. The SheetSense panel appears automatically.

3

Click Scan

Get a health score and prioritized issue list in under 3 seconds. Fix errors before they cost you.

Start free. Upgrade when it saves you money.

Every plan includes all detection features. Pay for volume and monitoring.

Free
For individual spot-checks
$0
Forever free
  • 3 scans per day
  • All 15+ error detection rules
  • Health score & issue list
  • Google Sheets + Excel Online
Install Free
Team
For teams making decisions on shared sheets
$19/user/mo
Billed monthly · min 3 users
  • Everything in Pro
  • Team-wide dashboards
  • Shared sheet monitoring
  • Role-based blame tracking
  • Audit-ready error reports
  • Admin controls & SSO
  • Dedicated support
Get Team Plan

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

Install SheetSense in 10 seconds and find out. No signup, no credit card, no data leaves your browser.

Install Free — Chrome Web Store