Columns shifted, dates in five different formats, mojibake in the middle of a name — paste the file as it is and this tool finds the damage and repairs it.
e.g. “split the address column into prefecture and city”, “drop honorifics”, “add a phone number column”
Up to 200 rows / 60,000 characters per run. Anything larger should go through the Repair button above (rule-based, no network, no row limit). In AI mode your CSV is sent to an LLM through our server — do not use it for confidential data.
A file that mixes commas and semicolons is normalised against the dominant delimiter.
Rows with too few columns get padded, rows with too many are trimmed, so the table lines up again.
Values that contain a delimiter or a line break but were never quoted get wrapped correctly.
Full-width to half-width characters, trimming, dates unified to YYYY-MM-DD, and European decimals such as 1.234,56 converted.
Flags the classic broken patterns (é, �, 縺, 繧) and reports which rows are affected.
Describe what you want in plain language — “split the address into prefecture and city” — and the AI turns it into a repair plan.