---
title: "Free CSV Cleaner | formformform"
description: "Clean pasted CSV by trimming whitespace, removing blank and duplicate rows, and normalising column headers locally."
url: "https://www.formformform.com/tools/csv-cleaner"
type: static
generatedAt: "2026-08-23T18:56:58.727Z"
---
# CSV cleaner

Trim cells, remove empty or duplicate rows, normalise headers and repair common CSV export problems.

Clean a CSV export in one pass: trim surrounding whitespace, remove blank rows and optionally remove exact duplicate rows. Preview and download the result without uploading it.

## Quote-aware parsing

Quoted commas and doubled quotes remain inside the correct cell.

## Conservative cleanup

Only surrounding whitespace, blank rows and exact duplicates are changed.

## Valid output

Cleaned cells are escaped back into standard CSV.

## Frequently asked questions

Does it change capitalization?

No. Values are not rewritten beyond the selected cleanup.

How are duplicates detected?

Rows are compared by all cleaned cell values, excluding no columns.

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## Want the form to collect the answers too?

Hand-written HTML still needs somewhere to post to. formformform gives you the form, the hosting, the responses and the notifications — free while we are in early access.

[Start free](https://app.formformform.com/register?utm_source=landing&utm_medium=bottom&utm_campaign=tools&utm_content=csv-cleaner)