#224 · Merge Split & Organize Tool

Interleave Rows from Two Spreadsheets

Combine two spreadsheets by alternating their rows while keeping the operation entirely in your browser.

Office File Tool

Choose exactly two files
row
rows
Ad space

How to use this office tool

  1. Select the required spreadsheet files.
  2. Choose the worksheet and adjust the available options.
  3. Select Interleave rows and inspect the bounded preview.
  4. Download the newly generated result file.

What this tool does

Combine two spreadsheets by alternating their rows while keeping the operation entirely in your browser.

After one shared header, the output alternates a row from file one with a row from file two. Remaining rows from the longer file are appended.

Files remain on this device. Keep a backup of the source file and review generated reports before acting on them.

Supported formats

Requires exactly two XLSX, XLS, CSV, or TSV files. The first worksheet from each file is used; advanced workbook objects are not carried into the new file.

FormatSupport
XLSX / XLSBrowser parsing with SheetJS CE
CSV / TSVDelimited table input
OutputNew XLSX, CSV, JSON, or YAML report

Tips for better results

  • Use a clear header row and unique column names.
  • Keep identifiers such as postal codes stored as text.
  • Check dates, large integers, and formula results in the preview.
  • For sensitive workbooks, close the tab after downloading the result.

FAQ

Does the interleave rows from two spreadsheets upload my file?

No. The selected file is read and processed locally by JavaScript in your browser. This page does not send its contents to a processing server.

What happens to formulas and formatting in this interleave rows from two spreadsheets?

Requires exactly two XLSX, XLS, CSV, or TSV files. The first worksheet from each file is used; advanced workbook objects are not carried into the new file.

How large a file can I process with the interleave rows from two spreadsheets?

The page enforces a 50 MB per-file and 1,000,000-cell safety limit. Practical capacity also depends on your device memory and browser.

Can I review the interleave rows from two spreadsheets result before downloading?

Yes. A bounded preview and summary statistics appear after processing. The full newly generated result is available from the Download button.

Why might the interleave rows from two spreadsheets result differ from Excel?

Browser libraries read stored workbook data but do not reproduce the complete Microsoft Excel calculation and rendering engine, VBA, Power Query, or every advanced workbook object.

Processing notes

AreaBehavior
PrivacyLocal browser processing
PreviewLimited rows and columns
SafetyCSV formula-prefix protection option

Browse more office tools

Office tool hubs