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How to combine multiple spreadsheets into one

Consolidating multiple spreadsheets into one is the recurring nightmare of anyone who works with data: a spreadsheet per branch, a report per month, a base per salesperson. With two, copy and paste does the job. With ten, you need a process. Here's how to combine multiple spreadsheets without losing your mind.

Decide the final structure first

Before merging anything, define what the consolidated file will look like:

  • Which columns will the result have? Keep only the ones that truly matter.
  • How do you identify the source? Sometimes an extra column noting which spreadsheet each row came from is worth it.
  • What about duplicates? Decide whether repeated rows should be removed.

Defining this upfront avoids rework after you've stacked thousands of rows.

Step by step in Excel

  1. Create a new spreadsheet that will be the consolidated base, with the final header defined.
  2. Open each source spreadsheet and align its columns to the base structure.
  3. Copy the data (without the header) and paste it below the previous rows in the base.
  4. Use Data → Remove Duplicates and check the totals at the end.

The risk here is human: skipping a file, pasting into the wrong column, or forgetting to standardize a header. The more files, the higher the chance of error.

The fast way: combine spreadsheets online

Instead of repeating the process file by file, you can upload them all at once, pick the columns that go into the result and download a single consolidated file. On Tablix, free-plan processing happens on your own device.

Combine my spreadsheets

Frequently asked questions

How many spreadsheets can I combine at once? With copy and paste there's no limit beyond your patience. In online tools, the limit depends on the plan — Tablix combines several files in a single operation.

Do the spreadsheets need the same columns? Ideally yes. When headers diverge, standardizing them first ensures the data lands in the right column.

Does it work with CSV files too? Yes. See also how to combine CSV files and how to merge spreadsheets in Excel.