text

CSV Viewer and Cleaner

Preview CSV files locally and clean common issues such as spaces, empty rows, and duplicates.

Local processing. CSV files are read and cleaned locally in this browser tab. Files are not uploaded.

Files are read locally in this browser tab.

CSV preview ready

3 rows, 2 columns. Removed 1 empty and 1 duplicate rows.

namescore
Ada10
Grace9

Preview shows the first 12 rows to keep the page responsive.

How to use Clean CSV

  1. 1Choose a CSV file or paste CSV text.
  2. 2Toggle trimming, empty-row removal, and duplicate-row removal.
  3. 3Preview the first rows in a table.
  4. 4Download the cleaned CSV file.

Frequently asked questions

Does the CSV cleaner upload files?

No. Files are read with browser APIs and cleaned locally on your device.

Can it remove duplicate rows?

Yes. Enable duplicate-row removal to keep the first matching row and remove later repeats.

Why only preview the first rows?

Large CSV files can be heavy to render, so the preview is capped while the download still uses the cleaned output.

Related tools

Keep working with other private browser-based utilities.

Text

CSV to JSON Converter

Convert CSV rows into JSON objects locally with delimiter detection and live output.

Text

JSON to CSV Converter

Convert JSON objects into CSV rows locally, including nested object flattening.

Text

XLSX to CSV Converter

Convert spreadsheet sheets from XLSX files into downloadable CSV files locally.