Diff Two CSV Files

Diff Two CSV Files in your browser. Compare two CSVs line by line or ignore order, and instantly highlight added, removed, or changed rows with live output.

Paste CSV A or import a file below.
No file chosen
Paste CSV B or import a file below.
No file chosen
Total lines: 0
Options
Ignore row order
Maximize output

How to Use:

  • Paste the first CSV into the CSV File A box or use Choose File to import it
  • Paste the second CSV into the CSV File B box or import it as well
  • Toggle Ignore row order to compare rows regardless of position
  • Use Maximize output to expand the result view for easier inspection
  • Click Diff to compute differences output updates live and flashes on changes
  • Use Copy Output to copy the result or Export to File to download it
  • Use Clear All to reset both inputs, toggles, and output

What Diff Two CSV Files can do:

Diff Two CSV Files compares two sets of comma-separated data and tells you exactly what’s changed. It shows removed rows with a – and added rows with a +. If the headers differ, both are shown. You can compare line-by-line or toggle row-order independence to catch logical changes regardless of position. This makes it easy to track changes in exports, detect regressions in data, or validate updates. And it all happens instantly, offline, right in your browser.

Example:

CSV A:

name,age,city
Alice,30,London
Bob,25,Paris
Charlie,35,New York

CSV B:

name,age,city
Alice,30,London
Bob,26,Paris
Diana,22,Berlin

Output:

name,age,city
- Bob,25,Paris
- Charlie,35,New York
+ Bob,26,Paris
+ Diana,22,Berlin

With “Ignore row order” ON:Differences are based on content only not position.

Common Use Cases:

Perfect for comparing two exports, validating migrations, or detecting data edits without loading up a spreadsheet or writing custom scripts. Whether you’re a developer, analyst, or QA engineer, this tool makes CSV comparison fast, clean, and hassle-free.

Useful Tools & Suggestions:

Before comparing, Validate CSV helps catch formatting issues that could skew your diff. And if you want to merge changes after the comparison, Merge CSV Files can bring everything back together.

Related Tools