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.
Other free tools
- Survey sample size calculator
Work out how many responses you need for a given confidence level and margin of error.
- Survey margin of error calculator
Calculate the margin of error achieved by a completed survey sample.
- Survey response rate calculator
Measure delivery, start, completion, response and drop-off rates from a survey funnel.
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