Merge CSV Files

Combine multiple CSVs into one (Union). 100% private.

No uploads No signup Instant
1

Upload CSV Files

Drop multiple files you want to combine.

2

Align Columns

We match headers and verify structure.

3

Download Merged CSV

Get one unified file with all your data.

Drop files to merge

Click to upload or drag & drop multiple CSV files

Max 20MB 100% Private

What This Tool Does

This tool takes multiple files with similar headers and stacks them on top of each other to create one unified dataset.

How It Works

1Select multiple CSV files to upload.
2The tool aligns columns by name.
3It appends the data from all files into one.
4Download the merged master file.

Input Format

Multiple CSV files.

Output Format

One single merged CSV.

When to Use This Tool

  • Combining monthly reports into a yearly view.
  • Merging data from different regions.
  • Consolidating export batches.