Rightrow

Remove Duplicate Rows from CSV Files

Rightrow automatically detects identical and near-duplicate rows in your CSV. See exactly which rows are duplicates, choose how to handle them, and download a clean file, all in your browser.

  • Detects exact duplicate rows across all columns instantly
  • Identifies near-duplicates using fuzzy matching on key columns
  • Shows a detailed duplicate audit report before you clean
  • Keeps first occurrence, removes subsequent duplicates by default
  • Fast deduplication across files with hundreds of thousands of rows

Start cleaning

Upload your CSV below, or try with a free sample dataset.

Try with a CSV containing duplicates

Try interactive demo with no sign-up. Free account to upload & clean your files.

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Frequently Asked Questions

Which rows does Rightrow remove when deduplicating?

By default, Rightrow retains the first occurrence of each unique record and flags subsequent duplicates for removal. You can review all duplicate groups before downloading the sanitized file.

Can I inspect the removed duplicates before finalizing?

Yes. Rightrow provides a transparent preview and diff view showing exactly which records were identified as duplicates before you export.

Is this tool free to use?

Yes. You can test all diagnostic features and explore the cleaning pipeline using our 1-click interactive sample dataset with no sign-up or credit card required. To upload your own files and download sanitized exports, you can create a free Starter account in seconds (up to 250 rows per file, 5 cleaning runs per month).

What can I do without creating an account?

Without an account, you can launch the live interactive demo to inspect full data quality reports, view column profiling, review detected anomalies, and configure cleaning rules. Uploading your own files and exporting cleaned datasets requires a free account to ensure secure session handling.

Is my data private and secure?

Yes. Your data is strictly confidential. Files are processed securely in temporary session memory and purged immediately after processing. We never store your CSV records, never share your data, and never use your information to train AI models.

What file formats and sizes are supported?

Rightrow supports CSV and TSV files with automatic delimiter detection (comma, tab, semicolon, pipe) and character encoding repair. Free accounts support up to 250 rows / 2 MB per file, while Pro Analyst plans support files up to 250,000 rows (150 MB).