Catch the broken row.
Keep the leading zero.
A small check before a costly import. Review CSV structure, duplicate headers and formula-like cells. Your file stays in this browser.
1. Choose or paste a CSV
Select the delimiter yourself. An incorrect delimiter may make every row appear to have one column. This tool does not convert dates, prices or identifiers. A spreadsheet may still auto-convert values on import; choose text columns there to retain identifiers.
2. Review before exporting
| Record | Column | Finding | Explanation |
|---|---|---|---|
| Run a check to see results. | |||
Record numbers refer to CSV records, including the header. A quoted field can contain multiple physical lines. Only the first 200 findings are shown; the JSON report includes all findings and no original cell values.
Normalization preserves field strings, writes CRLF record endings and uses the chosen delimiter. Broken quoting is rejected, never guessed. Structural warnings are reported, not silently repaired.