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Merge Excel Sheets

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Supported formats: .csv,.xlsx,.xls,.xlsm,.xlsb,.tsv

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About Merge Excel Sheets

Combine multiple Excel sheets into one unified dataset. Supports vertical stacking (append), horizontal joining (merge on common columns), and side-by-side concatenation. Perfect for consolidating monthly reports, regional data, or multi-tab workbooks.

Working with multi-sheet Excel workbooks? This powerful tool lets you merge multiple sheets into a single unified dataset.

Choose from three merge modes: vertical append (stack sheets), inner/left/outer join on common columns (like SQL), or side-by-side concatenation.

Automatically adds source sheet tracking, handles column mismatches, and previews results before merging.

Perfect for financial analysts consolidating quarterly reports, data scientists combining training datasets, or anyone dealing with sprawling Excel workbooks.

Category: Transformation & Logic

Common Use Cases

  • Consolidating monthly sales reports from different sheets
  • Merging regional data from separate tabs
  • Combining training and test datasets
  • Unifying departmental budgets
  • Stacking historical data year-over-year
  • Joining customer data with transaction data from different sheets

Key Features

  • Multi-sheet selection from XLSX files
  • Vertical append (stack sheets one below another)
  • Horizontal join on common columns (inner/left/outer)
  • Side-by-side concatenation
  • Optional source sheet column tracking
  • Smart column alignment
  • Preview before merging
  • Handles column name mismatches
  • Preserves data types
  • Works offline - your data never leaves your browser

The Merge Excel Sheets tool is compatible with: Excel Workbooks, Multi-tab Spreadsheets, Google Sheets Export, Financial Reports.

Once sheets are stacked or joined here, run Smart Merge if you still need to reconcile overlapping records by fuzzy key, or use Join Tables for a precise key-based lookup between the merged result and a third file, then export the consolidated dataset with CSV to XLSX.

Frequently Asked Questions

What's the difference between append and join?

Append stacks sheets vertically (one below the other), ideal when sheets have the same columns. Join combines sheets horizontally based on a common key column, like SQL joins.

Can I merge sheets with different columns?

Yes! In append mode, missing columns are filled with empty values. In join mode, you specify which columns to match on.

How do I know which sheet each row came from?

Enable "Add source sheet column" to automatically add a column tracking the original sheet name for each row.

A time-saver for financial analysts and ops teams stuck manually copy-pasting tabs from the same workbook every reporting cycle.

Read the related guide →