Keep your spreadsheets healthy.

Detect formula errors, duplicates, mixed data types, and header drift — automatically.

Install from Google Workspace Marketplace

Free · No external APIs · Runs entirely in Google Sheets

What it detects

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Missing Formulas

Finds cells where formulas are expected but plain values exist.

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Inconsistent Formulas

Detects formulas that deviate from the column's majority pattern.

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Duplicates

Identifies duplicate values in any key column you choose.

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Mixed Types

Flags columns that mix numeric and text values unexpectedly.

H

Header Drift

Alerts when headers change from a saved baseline snapshot.

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Auto Monitoring

Real-time scans on edit with daily email health reports.

How it works

1

Install the add-on

Add DownforSheets from the Google Workspace Marketplace.

2

Run a scan

Click Run Full Scan from the DownforSheets menu.

3

Review & fix

See your health score and fix issues with one click.