Add the data
Drop a CSV or JSON file into the cleaner, choose it from your device, or paste the raw data.
PaperMoon ToolsFree local browser tool
CSV & JSON Cleaner
Clean awkward exports, remove duplicate rows, split large files, and download tidy data.
Cleanup recipe
Make it usable.
1 blank rows removed1 duplicates removed1 export file
Preview
Check before download.
| name | status | |
|---|---|---|
| Ada Lovelace | ada@example.com | active |
| Grace Hopper | grace@example.com | active |
Quick guide
How to clean a CSV online.
Choose the cleanup
Trim extra spaces, standardize column names, remove blank rows, and delete exact duplicates.
Preview and export
Check the first rows, select CSV or JSON, choose a split size, and download the clean files.
Straight answers
CSV cleaner FAQ.
Does PaperMoon receive my file?
No. Cleaning happens locally in your browser. We do not receive its name, contents, rows, or columns.
What counts as a duplicate?
Two rows are exact duplicates when every cleaned cell value matches. Similar but different rows stay intact.
Can I convert CSV to JSON?
Yes. Add CSV data, select JSON under Export format, then download the cleaned result.
Can I split a large CSV?
Yes. Enter the maximum rows per file and the download area will create a separate button for each part.