Clean CSV data in minutes, not hours
Sift finds duplicate rows, broken emails and websites, numbers stored as text and empty cells, then lets you decide what gets fixed.
Prices exclude tax. Or get Sift, Pulse and MAP Matrix together for $49.99 USD / month.
| Name | Age | |
|---|---|---|
| Ana Cruz | ana@gmail.com | 34 |
| Ben Lee | ben@yahoo | 29 |
| Ana Cruz | ana@gmail.com | 34 |
| Cara Diaz | empty | 1,200 |
| Dan Wu | DAN@WU.COM | 41 |
| Eve Roy | eve@roy.co | empty |
See exactly what changed
Every fix is logged by row, so you can check the work and download the log with your cleaned file.
- Removed 1 duplicate row (kept first copy): row 4
- Row 3, "email": "ben@yahoo" → "ben@yahoo.com"
- Row 6, "email": "DAN@WU.COM" → "dan@wu.com"
- Row 5, "age": "1,200" → "1200"
- Row 7, "age": filled with the median
Sift at a glance
Duplicate detection
Matches rows that differ only by capital letters or spacing, and keeps the first copy.
Format repair
Lowercases emails, adds https:// to websites, completes common domains like gmail.com and turns numbers stored as text into numbers.
Missing values
Spots empty, N/A and null cells. Leave them, remove those rows, or fill numbers with the median and text with "Unknown".
Edit by hand
Click any highlighted cell and type the fix yourself. Issues are re-checked as you go.
Change report
Every change is logged by row, and you can download the log alongside your cleaned CSV.
Private by design
Your file is processed in your browser and never uploaded.
Three steps
Upload your CSV
Drop in a comma, semicolon or tab separated file.
Scan and review
Duplicates, format problems and missing values are color coded so you can see exactly what Sift found.
Fix and download
Apply the fixes you want, then download the cleaned CSV and the change report.
Built for marketers and small business owners who work with email lists, ad platform exports, survey results and customer spreadsheets, and need them tidy before they analyze or import them.
About Sift
Is my CSV uploaded anywhere?
No. Sift runs in your browser, so your file stays on your device.
Will Sift change my data without asking?
No. It highlights issues first. Nothing changes until you choose a fix.
What file types can I use?
CSV files, including semicolon and tab separated exports.
Get Sift for $4.99 USD / month
Or take all three tools for $49.99 USD / month. Prices exclude tax.