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Data & Spreadsheets

CSV Cleaner.

Review detected delimiter and UTF-8/UTF-16 encoding, then repair whitespace, blank rows, quoting and newlines to normalized UTF-8 CSV. Data stays in this browser. Review detected delimiter and UTF-8/UTF-16 encoding, then repair whitespace, blank rows, quoting and newlines to normalized UTF-8 CSV.

Use CSV Cleaner

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 CSV Cleaner upload my data?

CSV Cleaner runs locally in your browser. Bytes, schema, values and outputs stay in this browser.

What output does CSV Cleaner create?

CSV Cleaner 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.Remove Duplicate CSV RowsDeduplicate by selected key columns with explicit first, last or counted aggregate policy.
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