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Clean
Duplicate Contact Finder
Upload a CSV or spreadsheet and find duplicate contacts by normalized email or phone before importing them.
Free, no account Inputs stay in your browser
Your details
The file is processed locally in this browser. The tool prefers email and phone matches instead of only comparing whole rows.
Result
Your result will appear here
Complete the fields on the left. The result becomes the focus of the workspace when it is ready.
Your tool inputs stay in this browser.
Need help?
Only the details you need.
The tool is intentionally simple. Open an answer only when you need it.
How does this tool work?
- Upload a CSV, XLS or XLSX file.
- The browser looks for email and phone columns and normalizes those values.
- Review duplicate counts and download a cleaned CSV that keeps the first matching contact.
Does Lynka upload my spreadsheet?
This free checker processes the file in your browser. Tool analytics do not include your contact data.
How are duplicates detected?
The tool prefers normalized email or phone matches. If neither field exists, it falls back to exact full-row matches.
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