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Merge Columns

Merge spreadsheet or CSV columns with a custom separator.

Rows and columnsExcel and Google Sheets friendlyLocal text processingExcel and Sheets friendly

Input 1

4 × 4

Rows × columns

Input 2

4 × 4

Rows × columns

Output

7 × 4

Rows × columns

Mode

appendRows

Selected merge mode

Delimiter

auto

Detected or selected

Duplicates removed

0

Exact row matches

Merged Output Preview

SKUNamePriceStock
A1Blue Mug9.9942
B2Notebook4.5080
C3Desk Lamp24.0015
B2Notebook4.5080
D4Water Bottle12.0033
E5Wireless Mouse18.5021

Dynamic Merge Insights

Your tables were merged by appending rows.
The merged output contains 7 rows and 4 columns.
One header row is preserved in the output where practical.
No duplicate rows were removed with the current settings.
No major merge warnings were detected.

How Spreadsheet Merging Works

Spreadsheet merging combines two tables into one output.

Row appending stacks records vertically, while column appending joins tables side by side.

Key-based merging matches rows using shared identifiers such as SKU, email, or order ID.

Merge Modes Explained

Append rows

Stack table 2 below table 1.

Append columns

Place table 2 columns to the right of table 1.

Combine unique rows

Append rows and remove exact duplicates.

Merge by key

Match records using a shared key column.

Headers, Duplicates, and Column Matching Notes

Headers describe each column.
Matching headers make row appends safer.
Duplicate headers can create ambiguity.
Duplicate rows may come from repeated exports.
Key columns should contain stable IDs like email, SKU, order ID, or customer ID.
Missing key values can prevent accurate matching.
Column order matters when pasting back into spreadsheets.

Excel, Google Sheets, and CSV Use Cases

Combining exported reports
Merging monthly spreadsheets
Combining product lists
Merging customer lists
Preparing CRM imports
Joining spreadsheet data by ID
Appending rows from copied sheets
Combining survey responses
Preparing clean CSV output
Consolidating data before sorting or deduping

Common Spreadsheet Merge Examples

Append monthly sales

Stack January and February sales rows into one report.

Merge by SKU

Match product tables using a stable SKU column.

Copied ranges

Append two copied Google Sheets ranges.

Remove duplicate customers

Combine customer lists and keep unique rows.

Join columns

Place name and email columns side by side.

Preserve one header

Keep one header row while appending data.

Align headers

Match columns by header names even when order differs.

Privacy and Local Processing Notes

Pasted spreadsheet data is processed locally in your browser.

No account is required and no backend storage should be added.

Downloaded output is generated locally from the browser.

Avoid pasting sensitive production data unless necessary.

This tool is intended for lightweight spreadsheet merging, cleanup, and import preparation.

Method Explanation

  1. 1Paste two spreadsheet tables or CSV-style datasets.
  2. 2Choose a merge mode.
  3. 3Select the delimiter or allow auto-detection.
  4. 4Choose header, duplicate, and cleanup options.
  5. 5Parse each input into rows and columns.
  6. 6Merge the data according to the selected mode.
  7. 7Show warnings for mismatches, duplicates, or missing keys.
  8. 8Preview, copy, or download the merged output.

Frequently Asked Questions

A spreadsheet merge tool combines pasted spreadsheet-style data into one output using row appending, column appending, duplicate removal, or key-based matching.

Related tools

More tools to try

Column Splitter
CSV Cleaner
CSV/TSV Spreadsheet Converter
Data Sorter
Remove Duplicate Rows