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Find and remove duplicate rows in your CSV. Select which columns to compare, and the tool normalizes values (case, spacing, phone formats) before matching. Your data never leaves your browser.
Drop a CSV file here
or click to browse — or paste CSV data below
Free CSV deduplicator that finds and removes duplicate rows based on the columns you choose. The tool normalizes values before comparing — lowercasing text, trimming spaces, and standardizing phone number formats — so "[email protected]" matches "[email protected]" and "(555) 123-4567" matches "5551234567". Select multiple columns and match on ALL or ANY. Perfect for cleaning lead lists, CRM exports, and mailing lists. All processing runs in your browser — your data never touches a server.
You pick which columns identify a unique row. The tool normalizes those values (lowercase, trim spaces, standardize phone digits), then does an exact comparison on the cleaned values. Two rows match only if their normalized values are identical in the selected columns. No guessing, no fuzzy thresholds — just clean, predictable matching.
Export your list as CSV. Drop it here. Select the columns that identify a unique contact (email is usually the best key). Click Find Duplicates. The tool keeps the first occurrence and marks the rest as duplicates. Download the clean CSV and import it into HubSpot, Salesforce, or any CRM.