CSV Duplicate Row Remover

Remove duplicate rows from CSV files and keep only unique records.

How It Works & Processing Standards

Remove duplicate rows from CSV files and keep only unique records.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Desktop max file size: 50MB
  • Mobile max file size: 20MB

CSV Duplicate Row Remover is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use CSV Duplicate Row Remover

  1. 1
    Input CSVPaste your CSV table into the deduplicator.
  2. 2
    Remove DuplicatesStrip identical subsequent row occurrences.
  3. 3
    Download Unique CSVCopy or download the clean, unique dataset.

Examples

Deduplicate Table
Input: email,name alice@example.com,Alice bob@example.com,Bob alice@example.com,Alice
Result: email,name alice@example.com,Alice bob@example.com,Bob (1 duplicate removed)

Common Use Cases

  • Cleaning mailing lists to prevent sending duplicate promotional emails
  • Preparing unique product catalogs before importing into e-commerce platforms
  • Cleaning survey responses or form submissions

Frequently Asked Questions (FAQ)

Does this keep the first occurrence of each row?

Yes, the first occurrence is preserved and subsequent identical rows are removed.

Have feedback or ideas for this tool? Suggest & Inquire →