#079 · Merge Split & Organize Tool

Append Excel Files Vertically

Stack rows from several Excel or delimited files into one worksheet. Match headers, skip repeated header rows, and download a consolidated XLSX file.

Office File Tool

Multiple source files
row
rows
Ad space

How to use this office tool

  1. Select two or more XLSX, XLS, CSV, or TSV files.
  2. Confirm the header row and whether repeated headers should be skipped.
  3. Append, inspect the combined preview, and download the XLSX file.

What this tool does

Reads the first worksheet from each selected file, uses the first file’s header structure, and appends compatible data rows vertically.

Multiple tables with matching columns → one header + vertically appended rows

Files with different column order or meanings should be standardized first. This tool aligns by position, not by semantic interpretation.

Supported formats

Reads XLSX, XLS, CSV, and TSV. Each file’s first worksheet is used, and the result is XLSX.

InputXLSX, XLS, CSV, TSV as applicable
ProcessingLocal browser session
OutputNew XLSX, TSV, XML, or HTML file

Tips for better results

  • Use the same column order in every file.
  • Remove title rows above the actual header.
  • Check the combined row count against the source totals.

FAQ

How many Excel files can I append vertically?

The page accepts multiple files, subject to your browser’s memory. Smaller, consistently structured files are the most reliable.

Does the tool repeat the header from every file?

No. With the header option enabled, it keeps the first header and skips the corresponding row in later files.

How are mismatched columns handled?

Rows are appended by column position. Short rows receive blank cells and wider rows extend the output, so review inconsistent sources.

Can I append CSV and Excel files together?

Yes. XLSX, XLS, CSV, and TSV can be selected together, with each source parsed into rows before consolidation.

Are all workbook sheets appended?

No. This version uses the first worksheet from each file to keep the merge rule clear and predictable.

Processing notes

PrivacyFiles stay in this browser session
PreviewLimited rows for responsive display
SourceThe original file is not overwritten

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