SheetDiff is a quick diff tool for Google Sheets™. It shows you exactly what is different between two lists, in one click and without VLOOKUP: compare spreadsheets, columns or CSV and Excel files, find what's missing, spot duplicates, and see what changed.

WHAT YOU GET
• Rows only in the first sheet (missing from the second), rows only in the second, and every changed cell, with old → new values
• A count of the matching rows that appear in both
• A plain-English summary, e.g. "3 rows removed, 4 added and 24 changed, mostly in Amount. Amount went up by 417.5 in total."
• +/- and % on every changed number, so price and stock changes are easy to read
• A color-coded comparison report in a new tab, with clickable row numbers that jump straight to the row
• Your original tabs are never modified

WORKS WITH YOUR DATA
• Two tabs in the same spreadsheet
• Two columns or lists on different tabs: set a custom range such as A1:A500 (header included)
• CSV or Excel files exported from your bank, store, CRM or accounting tool. The file is read in your browser and added as a tab.
• Another Google Sheets™ file: paste its link to compare two spreadsheets
• Match rows by an ID column (order #, email, SKU), by the whole row when there is no ID, or by row order. Duplicate IDs are flagged in the report instead of guessed.

SEE WHAT CHANGED OVER TIME
Snapshot a tab today. Next week, choose "What changed in this tab?" to see every row that was added, removed or edited since then, including deleted rows that version history makes hard to find. It's an easy way to track changes and audit edits.

GREAT FOR
Bank and ledger reconciliation · inventory and price lists · customer, member and email lists · HR rosters · month-end checks · comparing exports before an import · any "what's different?" question

FREE AND PRO
Free: sheets of any size, 5 runs a day, every count shown in full and the first 25 rows of each list, 3 snapshots.
Pro ($10 a year, cancel anytime): every difference listed, unlimited runs and snapshots, highlight differences in place, side-by-side view, CSV export, merge approved changes back, duplicate-key review, fuzzy matching, number tolerances, multi-column keys and saved presets.

PRIVACY
SheetDiff only accesses the spreadsheet you open it in. Your data stays in Google Sheets™ and is never sent to our servers.

Get started: Extensions → SheetDiff → Start, or try "Create sample data" from the same menu.