Complete file cleanup
CSV & JSON Cleaner
Trim cells, normalize headers, remove blank or duplicate rows, split large exports, and download CSV or JSON.
Clean a file
PaperMoon ToolsFree local browser utilities
Clean the small data mess. Keep the file on your device.
Three focused tools for exports, spreadsheets, and permitted contact lists. Processing happens in your browser; PaperMoon does not receive the source data.
One useful field
CSV Column Extractor
Choose one CSV column, remove blanks or duplicates, and download a simple text list.
Extract a columnPermitted contact lists
Duplicate Email Remover
Normalize and deduplicate an email list while removing blank or malformed addresses.
Clean an email listA narrow promise
Mechanical cleanup, with a human review still in charge.
These tools handle predictable cleanup rules. Always review dates, identifiers, near-duplicates, and consent before using the result. Nothing here verifies permission to contact a person.
Need a careful second pair of eyes?