TabmeldCombine, consolidate, compare and merge Google Sheets tabs and files in one add-on

Tabmeld does four spreadsheet jobs in one add-on: combine many tabs and files into one tab, group and total them (consolidate), compare two tables to see what's new, removed and changed, and update one table from another by a key column. Every job shows a free preview first, and anything that changes your data makes a backup tab before it starts.

What you get

• Combine many tabs and files into one tab, columns lined up by header name, with a source column
• Group and total (consolidate) with a check that totals in match totals out
• Compare two tables by any number of key columns: new, removed and changed rows, cell by cell
• Merge by key: fill blanks, overwrite or add columns from another table, never over formulas
• Refresh any combined or compare tab later with one click
• Only opens the spreadsheet you're in and files you pick; always previews and backs up first