SheetDiff
Detect splits, merges, changes & duplicates.
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About
SheetDiff™ is a Google Sheets add-on that compares spreadsheet data and produces detailed difference and quality assurance outputs directly inside Google Sheets. It supports multiple comparison modes: a structural diff that classifies rows as unchanged, modified, split, merged, added, or deleted; a cell-by-cell comparison with exact, normalized, or fuzzy matching and multiple row-alignment options; and a duplicate finder for one sheet or across multiple sheets with configurable match columns and optional bulk removal. Results are written to dedicated output sheets with color-coded views and inline text highlighting. The tool includes snapshot-based workflows for tracking edits over time, configurable settings (thresholds, mapping, and output limits), and pre-comparison transform rules (including regex) without altering source data. It can also import and compare sheets from other Google Drive spreadsheets and generates shareable report sheets with computed QA metrics.
Problem & solution
Problem
Hard to spot and report changes between Google Sheets versions
Solution
In-Sheets diff modes with color reports, QA metrics, transforms, and imports
Who it's for
Teams comparing, auditing, or cleaning spreadsheet data in Google Sheets
Main features
- Structural diff
- Cell-by-cell comparison
- Duplicate finder
- Exportable QA report
- Custom transform rules
Use cases
- Diff two sheet versions
- Find duplicates across sheets
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