CSV Tools

Find Common Rows

Find rows that appear in both CSV files

File A

File B

Common Rows

Paste or upload two CSV files to find common rows...

More Options

CSV Format

Input

Matching

How to Use This Tool

This tool finds rows that exist in both File A and File B.

  1. Load your files — Paste or upload both CSV files. Or click “Load sample” to try it out.
  2. View common rows — Rows that appear in both files are shown in the output.
  3. Copy or save — Copy the common rows to your clipboard or save as a CSV file.

FAQ

4 questions
Does this tool upload my data?
No. It runs entirely in your browser using JavaScript. Your CSV data is never sent to a server.
How does row matching work?
Rows are compared by exact match — all cell values must be identical and in the same column order for two rows to be considered the same.
What does count-aware mode do?
By default, common rows appear once in the output regardless of duplicates. Count-aware mode uses the minimum count — if File A has a row 3 times and File B has it twice, it appears twice in the output.
What if the files have different headers?
A warning is shown if headers differ. The output uses File A's header row.

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