Remove Duplicate Rows
Remove duplicate rows and keep only unique entries.
The Remove Duplicate Rows tool finds and removes repeated rows from structured data like CSV, TSV, or tabular text. Unlike the line deduplicator, it compares entire rows across all columns. Perfect for cleaning spreadsheet exports and database dumps.
What This Tool Does
Spreadsheet exports and database dumps often contain duplicate rows from joins, imports, or data entry mistakes. Manually finding and removing them in large datasets is impractical. This tool compares complete rows and removes exact duplicates while preserving unique entries and their original order. It handles comma-separated, tab-separated, and other delimited formats. The deduplication runs entirely in your browser, so even sensitive business data stays private.
Why Use This Tool
Duplicate rows in datasets are more than just annoying - they distort analysis, inflate counts, and waste storage. Database joins, CSV imports from multiple sources, and data entry errors all create duplicates. Finding them in a spreadsheet requires sorting, comparing, and manually deleting - tedious work for large datasets. This tool compares complete rows across all columns and removes exact matches instantly. It preserves your data's original order and keeps the first occurrence, giving you a clean dataset ready for accurate analysis.
How to Use
- Paste your tabular data into the input box, or upload a file.
- Select the delimiter used in your data (comma, tab, etc.).
- Click Remove Duplicate Rows to process.
- Copy the deduplicated data or download it.
Common Use Cases
- Cleaning duplicate rows from database exports
- Deduplicating CSV files before import
- Removing repeated entries from CRM data exports
- Cleaning up spreadsheet data after merging sheets
- Preparing unique datasets for analysis or reporting
Example
Tips
- Make sure your delimiter setting matches your data format (comma for CSV, tab for TSV)
- Headers are automatically preserved - the first row is never removed as a duplicate
- Combine with CSV Cleaner first to normalize whitespace that might prevent duplicate detection
Frequently Asked Questions
Does it compare entire rows?
Yes. Two rows must be identical across all columns to be considered duplicates.
Does it handle CSV and TSV?
Yes. It supports comma-separated, tab-separated, and other custom-delimited formats.
Is it free?
Yes, completely free with no usage limits.
Does it preserve headers?
Yes. The first row is always kept and not compared as a potential duplicate.
Is my data private?
Yes. All processing runs in your browser. No data is sent to any server.