Multiple-file spreadsheet merge

How to merge 3, 4, 5 or more Excel files

You do not have to merge files two at a time. A multi-file join can connect customers, orders, payments, CRM exports and other related spreadsheets in one workflow.

What makes a multi-file merge different?

With two files, a lookup only needs one relationship. With three or more files, each source may use a different worksheet, a different key-column name and a different set of useful output columns. MergeStudio lets you select several spreadsheet sources and map the matching field separately for each one.

Example: Customers.xlsx uses Customer ID, Orders.xlsx uses Account Number, Payments.csv uses Customer #, and CRM.xlsx uses Client ID. If those columns contain the same customer identifiers, they can be mapped together in one merge.

Files and sheets can be mixed

A source does not have to mean “one file.” You can upload several workbooks and then choose one or more worksheet tabs from each. You can also upload a single workbook that contains several tabs. The merge operates on the sheets you select.

Step by step: merge several files by a matching column

  1. Open the MergeStudio browser tool.
  2. Select all the XLSX, XLS or CSV files you want in the merge. You can choose several files in the same file-picker action and add more later.
  3. Select at least two worksheet sources. If each file has one obvious sheet, MergeStudio can select them automatically.
  4. Choose the merge result: Matches Only, Keep Main Sheet, Keep Everything, or Stack Rows.
  5. For a join, choose the matching column for every selected source. The headers do not need to be identical.
  6. Choose and reorder the columns you want in the finished spreadsheet.
  7. Preview the result and download a new XLSX file.

Which merge type should you choose?

Matches Only

Use this when you only want records that can be found across all selected sources.

Keep Main Sheet

Start with one authoritative list and enrich it with information from the other files.

Keep Everything

Keep records from every source, including records that do not have a match elsewhere.

When you should stack instead of match

If January.xlsx, February.xlsx and March.xlsx all contain the same kind of transaction rows, you usually do not need a matching key. Choose Stack Rows so the records are appended vertically. See join vs. stack for the decision rule.

Why this can be easier than repeated VLOOKUPs

Chaining lookup formulas across several workbooks means managing file references, lookup ranges, copied formulas and missing matches for every additional source. A visual multi-file join defines the relationship once for each sheet and produces a clean output file. See the VLOOKUP across multiple files guide for a fuller comparison.

Merge all of your spreadsheet sources in one workflow

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Merge multiple Excel files →