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How to merge two spreadsheets in Excel (step by step)

Merging two spreadsheets in Excel looks simple until you have dozens of columns, different formats and thousands of rows to reconcile. This guide covers the manual step by step in Excel and a faster alternative for when copy and paste starts to hurt.

Before you start: align the columns

The secret to a painless merge is making sure both spreadsheets speak the same language. Check three things first:

  • Matching headers: "E-mail" and "Email" are different columns to Excel. Standardize the names.
  • Same column order: makes it easier to stack the data without scrambling fields.
  • Same data format: dates, numbers and text should follow the same pattern in both files.

This alignment prevents 90% of the errors that show up after merging.

Step by step in Excel

To merge two spreadsheets by stacking the data (one below the other):

  1. Open the first spreadsheet — it becomes the base of the final file.
  2. In the second spreadsheet, select the data without the header (you already have one in the base).
  3. Copy (Ctrl + C) and paste it into the first empty row below the base data (Ctrl + V).
  4. Check that the columns are aligned and remove duplicate rows in Data → Remove Duplicates.

For a few files and a few rows, this works. The trouble starts when you have to repeat the process every week, with files that keep changing format.

When copy and paste doesn't scale

If any of these scenarios sound familiar, an automated approach is worth it:

  • Several files to merge at once, not just two.
  • Columns in a different order in each file.
  • A need to keep only some columns in the final result.
  • Repeating the task frequently.

The fast way: merge spreadsheets online

Instead of opening Excel and copying cell by cell, you can upload the files, pick the columns that matter and download the finished result — all in the browser, with nothing to install. On Tablix, free-plan processing happens on your own device, so your data never leaves your computer.

Merge my spreadsheets now

Frequently asked questions

Can I merge more than two spreadsheets at once? Yes. In Excel you stack one at a time; in online tools like Tablix you upload several files at once and merge them all into one.

Do the columns need to be in the same order? With manual copy and paste, yes — otherwise the data gets mixed up. In tools that match columns by name, order stops being a problem.

What if the spreadsheets are CSV instead of Excel? The process is the same. See also the guide on how to combine CSV files and when to use CSV or XLSX.