CSV Cleaner

Clean messy CSV files online. Trim cells, remove empty rows and columns, delete duplicate rows, fix ragged rows, change delimiters and repair quotes in one pass.

  • Free, no sign-up
  • Runs in your browser
  • Your data stays private

How to use the CSV Cleaner

  1. Paste your CSV or upload the file.
  2. Choose the clean-ups: trim, empty rows and columns, duplicates, ragged rows, line breaks in cells.
  3. Copy or download the clean CSV and check the preview.

Why use this CSV Cleaner

  • RFC 4180 parsingHandles quoted cells, escaped quotes and line breaks inside cells correctly.
  • Row repairPads short rows and trims long ones to match the header width.
  • Change formatConvert to comma, tab, semicolon or pipe and choose the quoting style.
  • Cleaning reportCounts cells trimmed, rows removed, duplicates and repaired rows.

Frequently asked questions

How do I clean a CSV file?

Paste or upload it, keep the default clean-ups on and download the result.

Can it change the delimiter?

Yes. Pick an output separator such as semicolon or tab and the file is rewritten with correct quoting.

Does it remove the BOM?

Yes. A leading byte order mark is stripped automatically.

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