Finance

Process financial statements and convert formats.

OFX to Excel QFX to Excel Excel to CSV CSV to Excel CSV Cleaner CSV Formatter Transaction Deduplicator Column Mapper PDF Statement to Excel Bank Statement Parser

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Transaction Deduplicator

Remove duplicate transactions from CSV files online free. Deduplicate bank statements, credit card transactions. Browser-based, no upload.

No upload required100% freeBrowser-based

Drag & drop CSV file here, or browse

Supports .csv files with transaction data

✓ Runs in browser — no upload🔒 100% secure & private⚡ Instant processing

How to Use the Transaction Deduplicator

Upload your CSV transaction file — column names are detected automatically.
Choose your match criteria (Amount, Amount+Date, etc.) and whether to keep the first or last occurrence.
Review grouped duplicates highlighted in the table, then preview the cleaned result.
Download your deduplicated CSV file — no data ever leaves your browser.

Features

Smart Column Detection - automatically finds date, amount, and description columns regardless of naming convention.
Multiple Match Modes - choose from exact amount, amount+date, amount+date+description, or fuzzy description matching.
Grouped Duplicate Review - see which transactions are duplicated together with clear visual grouping.
Preview Before Download - review both the duplicates and the cleaned result before exporting.
100% Private - all processing happens locally in your browser. No data uploaded anywhere.

Why Use Our Transaction Deduplicator

Duplicate transactions in bank statements and credit card reports can cause budgeting errors, misreported expenses, and accounting headaches. Our Transaction Deduplicator intelligently groups and highlights duplicate entries so you can clean your data in seconds. Whether you're reconciling accounts, preparing tax documents, or analyzing spending patterns, you get precise control over how duplicates are identified and which entries to keep — all without uploading sensitive financial data to any server.

FAQs

How does duplicate detection work?

The tool matches transactions by comparing the values in your chosen columns — amount, date, and payee/description. In fuzzy mode it uses a similarity algorithm to catch near-duplicate descriptions with minor differences.

What if my CSV has different column names?

The tool auto-detects common column names like "Date", "Transaction Date", "Amount", "Debit", "Description", "Payee", "Name", etc. You can also manually override the column selection if needed.

Is my financial data secure?

Absolutely. All processing is done locally in your browser. Your financial data never leaves your device, ensuring complete privacy and security.