Remove Duplicate Rows Online
- ✓ 100% Free
- ✓ No upload — runs in your browser
- ✓ No signup
- ✓ No ads
Free tool to remove duplicate rows from CSV and Excel files in your browser. Delete duplicate rows and see exactly how many were removed before downloading the clean file.
Drop a file here or click to browse
Supports .csv, .xlsx, .xls
How to Remove Duplicate Rows
- Select or drag your CSV or Excel file into the upload area above.
- Click Remove Duplicates. Processing happens in your browser.
- See the count of removed rows in the status message.
- Download the clean file — same format as the input.
Delete Duplicate Rows in CSV or Excel
This deduplicator removes duplicate rows from a CSV or Excel file and keeps the first occurrence of each unique row. Two rows count as duplicates only when every column value matches, so partial matches are preserved. Everything runs in your browser — no upload, no signup — and the clean file downloads in the same format you uploaded.
Common Use Cases
- Clean up a customer list with duplicate email addresses or names.
- Deduplicate merged data from multiple sources.
- Remove repeated entries from a scraped dataset.
- Delete duplicate rows from transaction logs before loading into a database.
Frequently Asked Questions
How do I remove duplicate rows from a CSV or Excel file?
Drop your CSV or Excel file above and click Remove Duplicates. The tool deletes repeated rows, shows how many were removed, and lets you download the clean file in the same format.
How does duplicate detection work?
Two rows are considered duplicates if all their column values are identical. The first occurrence is kept.
What formats are supported?
Both CSV and Excel (.xlsx, .xls) files are supported. The output is in the same format as the input.
Are my files uploaded to a server?
No. All processing happens entirely in your browser. Your files never leave your device.