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Data & Spreadsheets

Remove Duplicate CSV Rows.

Deduplicate by selected key columns with explicit first, last or counted aggregate policy. Data stays in this browser. Deduplicate by selected key columns with explicit first, last or counted aggregate policy.

Use Remove Duplicate CSV Rows

Private in this browser. Bytes, schema, values and outputs stay in this browser.

No file selected.
Tool options

Options appear after the file is inspected locally.

Preparing the local tool…

How it works

  1. 01

    Choose local data and review the options.

  2. 02

    Run the bounded operation in a worker.

  3. 03

    Download only the independently verified result.

Frequently asked questions

Is data uploaded?

No. The operation runs locally.

Does Remove Duplicate CSV Rows upload my data?

Remove Duplicate CSV Rows runs locally in your browser. Bytes, schema, values and outputs stay in this browser.

What output does Remove Duplicate CSV Rows create?

Remove Duplicate CSV Rows creates Csv output after the result passes its local verification checks.

Large CSV ViewerStream, search and page through a CSV locally while keeping every value as text, then independently rescan the source before downloading a bounded JSON report.Data AnonymizerMask, hash, tokenize, generalize or synthesize selected CSV columns locally, then independently reparse and verify every transformed cell before download.CSV CleanerReview detected delimiter and UTF-8/UTF-16 encoding, then repair whitespace, blank rows, quoting and newlines to normalized UTF-8 CSV.
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