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Merge Excel Files

Combine several workbooks or sheets into one file.

  • Free
  • No signup
  • Nothing uploaded
  • No watermark

Drop files here

Excel or CSV files · read on your device, never uploaded

Files are combined in the order shown. Drag them into place before merging.

Processed entirely on your device. Nothing was uploaded.

How to Merge Excel Files Online

Merge Excel Files: before and after XLS A BEFORE MERGE EXCELFILES XLS A AFTER

Combines several workbooks or sheets into one file. Header handling is what decides whether it works: matching by header name rather than by position means a source file with columns in a different order still lands correctly.

No software to install Free Works on any device

Step-by-Step Guide to Merge Excel Files

  1. 1. Drop in two or more Excel or CSV files

  2. 2. Choose one continuous sheet, or one sheet per file

  3. 3. Press Merge files

No .xlsx file to hand? Download a sample Excel file (21.6 KB) and try it.

Try it now

What Does Merge Excel Files Do?

Combines several workbooks or sheets into one file. Header handling is what decides whether it works: matching by header name rather than by position means a source file with columns in a different order still lands correctly.

XLSX files

.XLSX .XLS

Combine several workbooks or sheets into one file.

Why Use Excel and CSV Tools?

Data rarely arrives in the shape you need: one colleague sends CSV, a website gives JSON and the system wants Excel. These tools convert, merge, split and clean sheets so the rows are ready to use.

“Clean data first, and the analysis gets much easier.”
  • Any sheet into any format
  • Many workbooks in one
  • Columns picked and sorted
  • Help writing formulas
  • Duplicate rows removed
  • Large sheets split into parts
  • Tables ready for websites
  • Customer lists kept private

Popular Uses for Spreadsheet Converters

Spreadsheet chores are the same in every office, and these handle the dull ones.

  • Cleaning contact lists Remove duplicate rows from a customer or student list before sending a mailer.
  • Combining monthly sheets Join twelve monthly Excel files into one workbook for the yearly total.
  • Data for web apps Turn a sheet of products into JSON for a website or mobile app.
  • Opening exported JSON Turn a JSON or XML export from an online system into a readable Excel sheet.
  • Sharing some rows Split a large file so each branch or teacher gets only their own rows.
  • Tables for web pages Convert a CSV into an HTML or Markdown table to paste into a blog post.
  • Picking columns Keep only the name, phone and email columns from a long export.
  • Filtering and sorting Show only the rows for one city or date range, then sort them.

What You Can Do with Merge Excel Files

Accepts XLSX, XLS

Understands XLSX structure rather than treating the file as bytes

Merging happens on your own machine, at your machine's speed

Operates on parsed rows, so a comma inside a quoted cell is never mistaken for a column break

Shows the row count before and after, so a filter that removed too much is immediately obvious

Why Use ToolXkit for Merge Excel Files?

Your files stay with you

Everything runs inside your browser. Nothing you open or type is uploaded to a server.

Data Tools for Different Users

Small businesses

Tidy stock lists and customer records without buying extra software.

Teachers

Split class marks by section and remove repeated student entries.

Data analysts

Switch quickly between CSV, Excel, JSON and XML while preparing a dataset.

Developers

Turn spreadsheets from clients into JSON or YAML that code can read.

Marketing teams

Clean and merge lead lists gathered from different forms and events.

HR teams

Filter employee lists and share only the columns each manager needs.

Best Times to Clean Up a Spreadsheet

These tools earn their place when you are:

  • Importing contacts into a new system
  • Preparing a mailing list
  • Merging reports from several branches
  • Handing data to a developer
  • Publishing a table online
  • Opening a file Excel will not read
  • Splitting a sheet for different teams
  • Checking a list for repeats

Frequently Asked Questions

Answers to common questions about this tool.

Do I need to install anything to merge excel files?

No. Merge Excel Files runs entirely in your browser — there is nothing to download, no extension and no desktop program. It works the same on Windows, macOS, Linux, Android and iPhone.

Is it safe to merge excel files online?

Safer than the usual alternative, yes. Most online tools upload your file to a server you know nothing about, where it sits until someone deletes it. Here the file never leaves your device — the processing happens in the page itself, so there is no server copy to leak, retain or sell.

Can Merge Excel Files handle files with thousands of rows?

Usually, yes. Sheets with thousands of rows work well on most devices. Very large files depend on your computer’s memory, so a laptop copes better than an older phone.

Will formulas survive the conversion?

Formats like CSV, JSON and XML store values, not formulas, so a converted file holds the calculated results. Keep your original workbook if you will need the formulas again.

Why do dates or leading zeros look wrong afterwards?

Spreadsheet programs sometimes guess that a phone number or ID is a number and drop its leading zeros, or read a date in the wrong order. Check those columns, and format them as text in Excel if needed.

Further reading

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