UseCase Solution
Clean CSV Files & Remove Duplicates
Read UTF-8 CSV locally, compare duplicates by explicit rules, and export the result.
100% Local Processing
Large File Ready
Instant Results
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The Problem
CSV files from different sources often differ in case, edge whitespace, symbols, or numeric values, which can hide duplicates from exact matching.
Our Solution
Parse UTF-8 CSV locally, apply selected comparison rules, and inspect a sample preview before processing.
Key Features
Features optimized for this use case
Multi-file CSV import
Header and blank-row detection
Case, edge-whitespace, and symbol comparison
Regex extraction and numeric tolerance
Dedup + merge strategies
Local processing, zero upload
How It Works
Complete data cleaning in three simple steps
Upload CSV
Import one or multiple CSV files
Set Comparison Rules
Choose match fields and dedup strategies
Preview & Export
Review results and download
FAQ
Common questions about this use case
Yes. Upload multiple CSV files at once.
No. Comparison options do not normalize exported cell contents.
Performance depends on your browser. For huge files, consider processing in batches.
No. All processing happens locally in your browser.
Ready to Clean Your Data?
100% free. 100% local. Your data never leaves your browser.