Free CSV Cleaner
Remove duplicates, empty rows and messy formatting in seconds.
Drop your CSV file here
or click to browse · parsed and cleaned locally, never uploaded
Need more power? Meet CSV Cleaner Pro
One-time payment. Yours forever. No subscription.
| Feature | Free | Pro |
|---|---|---|
| Files per run | 1 file | Unlimited batch |
| File size / rows | Up to 5 MB · 10,000 rows | Unlimited |
| Remove duplicates, empty rows, trim spaces | Yes | Yes |
| Regex find & replace | — | Yes |
| Split & merge columns | — | Yes |
| Unify date formats | — | Yes |
| Fix garbled text (mojibake, incl. Chinese) | — | Yes |
| Reusable cleaning templates | — | Yes |
| Excel (.xlsx) import & export | — | Yes |
| Ads | Shown on page | Ad-free |
| Updates | — | Lifetime free updates |
Frequently asked questions
Is my CSV file uploaded to your servers?
No. Your file is parsed and cleaned entirely inside your browser using JavaScript. It never leaves your device. You can verify this in your browser's network panel — or simply disconnect from the internet after the page loads and keep cleaning.
What problems does the free cleaner fix?
Duplicate rows, completely empty rows, leading/trailing whitespace, and blank cells (optionally filled with a value you choose). It also shows a 0–100 data quality score before and after cleaning.
Is there a file size limit?
The free version handles one file up to 5 MB or 10,000 rows. CSV Cleaner Pro ($29 one-time) removes all limits and adds batch processing, regex rules, Excel support and more.