Remove Duplicates

Clean your CSV by removing duplicate rows. Hash-based exact matching handles 10M+ rows. Fuzzy matching (Levenshtein) limited to 500K rows.

How it works: Upload a CSV → select columns to check → choose keep strategy (First, Last, or Newest) → download cleaned file. Privacy first: Everything happens in your browser — your data never leaves your device.

Upload CSV file

Click to browse or drag and drop

No file? Try it instantly with synthetic sample data.

Benchmark Performance

Real-world tested, production-ready

435K rows/sec

10M+ rows

23 seconds

View full benchmark →