CSV / Excel Clean & Check
Fix common data-quality problems and download UTF-8 CSV.
Choose a file
CSV, TXT or XLSX; maximum 10 MB. XLSX reads the first worksheet only.
Reserved layout area
What it checks
- Outer whitespace
- Blank or repeated headers
- Empty cells
- Exact duplicate rows
Limitations
It does not infer types, repair formulas, merge sheets or detect near-duplicates. Keep the original and review output.
FAQ
Is my file stored?
Your file is processed locally in this browser and is not uploaded to our server.