Detect and read UTF-8, BOM, Shift-JIS / CP932 and related encodings.
CSV DoctorMake messy CSVs
Make messy CSVs
easier to handle.
Diagnose common CSV problems such as broken encoding, shifted columns, full-width characters and extra whitespace in your browser, then apply only safe fixes to a corrected copy.
No upload requiredUTF-8 / Shift-JIS supportRuns in your browser
Drop your CSV file here
or Choose a file
.csv / .tsv / .txt · up to 10MBFiles are processed in your browser and are not sent to a server.See real diagnostics on fictional demo data without choosing a file.
Find mismatched column counts, duplicate headers, full-width characters and extra whitespace.
Only deterministic changes such as whitespace cleanup are applied to the corrected file.