Compare CSV Files

Compare two CSV files and see all differences. 100% private.

No uploads No signup Instant
1

Upload Two CSVs

Drop your Old and New versions.

2

Diff Analysis

We align rows and detecting changes.

3

View Report

See added rows, removals, and edited cells.

Drop Original & Modified CSVs

Drag & drop your two CSV files here to compare

Max 20MB 100% Private
1
Original File
Empty (Drop file above)
2
Modified File
Empty (Drop file above)

What This Tool Does

This tool performs a diff operation on two datasets. It matches rows (using a primary key if provided) and highlights exactly what triggered a change.

How It Works

1Upload the 'Old' file and the 'New' file.
2The tool aligns the datasets.
3It generates a visual diff showing deletions (red) and additions (green).
4Export the list of changes.

Input Format

Two comparable CSV files.

Output Format

A diff report or a 'Changes Only' CSV.

When to Use This Tool

  • Verifying what changed between two data dumps.
  • Auditing changes made by a colleague.
  • Checking data integrity after a migration.