DatumFuse
Remove duplicate rows from a CSV
Paste your data to strip out duplicate rows and tidy up the result in one pass.
Open AI Data Cleaner →Duplicate rows quietly distort everything downstream — they inflate counts, skew averages, and double-send to the same contact. Spotting them in a large spreadsheet by sorting and scanning is slow, and conditional-formatting tricks only get you so far before you still have to delete each one.
The DatumFuse Cleaner removes exact duplicate rows automatically as part of its cleaning pass, and normalizes the remaining data at the same time so near-duplicates caused by inconsistent formatting collapse together too. Paste your CSV, run the clean, and download a deduplicated file.
How it works
- 1
Paste your CSV
Add the data that contains duplicate rows.
- 2
Run the cleaner
It removes exact duplicates and normalizes formatting in one step.
- 3
Download the result
Get a deduplicated, tidy file back.
Use cases
Mailing-list hygiene
Remove repeated contacts before a send so no one is emailed twice.
Clean aggregates
Strip duplicates so counts and sums in your reports are accurate.
Import readiness
Dedupe an export before loading it into a system that rejects duplicates.
Frequently asked questions
- How do I remove duplicate rows from a CSV?
- Paste your CSV into the Data Cleaner — exact duplicate rows are removed automatically as part of cleaning.
- Does it also handle near-duplicates?
- Cleaning normalizes formatting first, so rows that were only different due to inconsistent casing or spacing collapse together.
- Is it free to try?
- Yes — you can dedupe pasted data without signing up.
- Can I keep the first occurrence?
- Yes — deduplication keeps a single copy of each duplicated row and removes the extras.
Powered by the AI Data Cleaner
Clean and normalize messy CSV data with AI. Standardize formats, fix inconsistent fields, and remove duplicate rows, then export a tidy dataset.
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