Developer & data · By AIXpress
CSV Record Deduplicator
Remove duplicate CSV records using selected key columns or complete rows, keeping the first matching record.
Analysts removing repeated exports or duplicated contact records by exact keys.
Free to use. Your inputs are processed in this browser and are not included in usage analytics.
How to use csv record deduplicator
- Paste CSV with unique column headers.
- Choose key columns as a JSON array, or use [] for complete-row equality.
- Export the first record for each unique key combination.
What to know about the result
- Quoted separators, doubled quotes, and quoted line breaks are parsed correctly. Inputs are limited to 10,000 rows and 50,000 cells.
- Exported formula-like cells receive one apostrophe prefix for spreadsheet safety. Reimports preserve that prefix; remove it only when you trust the original value.
- Keys compare exact strings, including case, whitespace, and leading zeros. Multiple key columns are compared without delimiter ambiguity.
- Later records sharing selected keys are removed even when other columns differ; choose complete-row comparison when those differences matter.
Related tools
- CSV to JSON Converter
Turn CSV with a header row into a JSON array while preserving text values and leading zeros.
- CSV to TSV Converter
Convert quoted CSV into tab-separated text for spreadsheet and data-import workflows.
- CSV Column Selector
Select and reorder named CSV columns while preserving quoted cell content and the original row order.
For the next step, explore PDF tools and small business templates.