Clean messy spreadsheets
in seconds.
Drop a CSV or Excel file. CSVTidy finds duplicates, standardizes date formats, splits full-name columns, normalizes phone numbers, and more — all right in your browser.
- Runs entirely in your browser — no upload
- CSV, TSV, and .xlsx supported
- Undo any change instantly
- Free forever for basic cleanups
The cleanups you actually do every week.
Every tool is a real, working transform — not a preview. Free, no account required.
Case-insensitive, whitespace-normalized. One click.
Convert 03/14/2024, 14 Mar 2024, 2024-03-14 into one consistent format.
Turn 'Jane Smith' or 'Doe, John' into First + Last columns.
US/CA numbers detected and reformatted to E.164 or pretty format.
Strip leading/trailing spaces and collapse doubles across every cell.
Describe the fix in plain English. Coming to the Pro tier.
Three steps. Zero uploads.
- Drop your file
CSV, TSV, or Excel. Up to 25 MB in your browser. Or paste text directly.
- Review suggestions
The tool detects date columns, duplicates, phones, and more, and suggests one-click cleanups.
- Download clean data
Export to CSV or Excel. Undo any step. Nothing is stored on our servers.
AI custom rules — describe the fix in plain English.
"Split this column on the last comma." "Convert every price to USD." "Merge duplicate rows but sum the amount column." Coming to the Pro tier. Drop your email — one message when it ships.