CSV Deduplicator
Remove duplicate rows from a CSV by the whole row or a key column, with case-insensitive matching. Free, private — copy or download the result.
Deduplicate CSV rows
Paste CSV to remove duplicate rows — by the whole row or a key column.
What this CSV deduplicator does
Common use cases
- 1Cleaning a contact export
- 2Removing repeated records
- 3De-duplicating by email or ID
- 4Tidying a merged dataset
- 5Preparing data for import
- 6Cutting redundant rows
Related tools
About deduplicating CSV
Merged or exported spreadsheets often contain duplicate rows that inflate counts and cause double processing. This tool removes them, either when the entire row matches or when a chosen key column (like email or ID) repeats.
It keeps the first occurrence, preserves order, and can ignore case when comparing. Everything runs in your browser, so private data never leaves your device.
More Free Tools Where This Came From
This utility is one of dozens of free, no-login tools for DNS, email, SEO and developers — all instant and private.
HostCloud.in · Pune, India · Serving 34,987+ Websites Since 2020
Got Questions? We Have Answers.
How does it detect duplicates?
By the entire row, or by a key column you choose (like email or ID). It keeps the first occurrence and preserves order.
Can it ignore case?
Yes. Turn on case-insensitive matching to treat values that differ only in case as duplicates.
Is my data uploaded?
No. Deduplication runs entirely in your browser.
Does it show how many were removed?
Yes — you see input, unique and removed counts.