Compare Two CSV Files

Compare Two CSV Files side-by-side to spot differences instantly. Highlight added or removed rows, trim whitespace, and export your diff with one click.

Paste CSV A or import a file below.
No file chosen
Supported file types: .csv, .txt, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Paste CSV B or import a file below.
No file chosen
Supported file types: .csv, .txt, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total differences: 0
Options
Trim lines
Show only differences
Maximize output

How to Use:

  • Paste content into CSV File A and CSV File B, or use Choose File to upload .csv, .txt, or other text files.
  • Turn on Trim lines to remove whitespace from the start and end of each line before comparing.
  • Enable Show only differences to hide identical rows and zero in on what changed.
  • Use Maximize output to expand the output box if you need a better view.
  • The result appears in the Comparison Output box right away and flashes when it updates.
  • A - means the row exists only in File A. A + means it’s only in File B. Rows with no prefix exist in both files.
  • Click Copy Output to copy the result or Export to File to save it.
  • The tool displays a live Total differences counter under the output.
  • Use Clear All to reset everything, including inputs and file uploads.

What Compare Two CSV Files can do:

Compare Two CSV Files helps you find exactly what’s different between two data sets. It highlights new rows, missing rows, and shared content without needing spreadsheet software. Toggle on focused modes like whitespace trimming or difference-only view, and you’ll catch changes instantly. You can import files, edit them directly, and download your clean diff in seconds. It all runs in the browser fast and secure.

Example:

CSV File A:

Name,Age,City
Alice,30,New York
Bob,27,London
Charlie,33,Sydney

CSV File B:

Name,Age,City
Alice,30,New York
Bob,28,London
Daniel,40,Berlin

Output (with only differences):

- Bob,27,London
- Charlie,33,Sydney
+ Bob,28,London
+ Daniel,40,Berlin

Output (with all rows):

Name,Age,City
  Alice,30,New York
- Bob,27,London
- Charlie,33,Sydney
+ Bob,28,London
+ Daniel,40,Berlin

Common Use Cases:

Use Compare Two CSV Files to check if two datasets match, confirm edits, or review exports before sending them on. It’s perfect for spotting small differences that could cause issues later. Whether you’re auditing records, syncing files, or testing outputs, this tool gives you a fast and clear comparison every time.

Useful Tools & Suggestions:

Start with Diff Two CSV Files to get a line-by-line breakdown of the differences. And if you need to merge changes afterward, Merge CSV Files makes combining edits pretty painless.

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