CSV Duplicate Row Finder

Find and highlight completely duplicate rows across all columns in CSV datasets.

How It Works & Processing Standards

Find and highlight completely duplicate rows across all columns in CSV datasets.

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 Finder 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 Finder

  1. 1
    Paste CSVEnter CSV table data.
  2. 2
    Scan for DuplicatesAnalyze all rows for identical cell values.
  3. 3
    Review DuplicatesView duplicate records and their repeat frequencies.

Examples

Find Duplicates
Input: id,name 1,Alice 2,Bob 1,Alice
Result: Duplicate Found (Count: 2): 1,Alice

Common Use Cases

  • Auditing customer contact lists for double submissions
  • Checking database export files for repeated records before ETL import
  • Detecting duplicate log events or web scraper outputs

Frequently Asked Questions (FAQ)

Are spaces considered when comparing rows?

You can enable trimming so leading and trailing whitespaces do not prevent duplicate detection.

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