Free CSV Cleaner
Clean messy spreadsheet data in minutes
Upload a CSV, review every proposed change in a before/after preview, and download standardized data. No account, no signup, no sales call.
No signup · CSV up to 2MB / 2,500 rows · Exports deleted after 24 hours
What the tool does
Smart column detection
CleanSheet automatically identifies phone numbers, email addresses, dates, and names in your file. No manual mapping required.
Before/after preview
Every proposed change is shown side by side with a confidence score before anything is applied. You stay in control of your data.
Standardized output
Phones become (555) 123-4567, emails become lowercase, dates become YYYY-MM-DD. Download the cleaned result as CSV.
How it works
- Upload a CSV file (up to 2MB / 2,500 rows). Excel support is coming soon.
- Review the detected column types and the before/after preview.
- Apply the cleaning rules you want and download your clean CSV.
No file handy? The Dirty Data Generator creates a realistic messy spreadsheet you can test with.
Coming next: bigger files, API access, and the Data Engine
The free tool covers files up to 2MB and 2,500 rows. Credit packs for larger files are next, followed by API access, and then the Data Engine: a pipeline-scale platform, currently in private development, that automates ingestion from government and commercial sources, validates every record with a full audit trail, and delivers clean data to your database, files, or API.
One waitlist covers all of it. Join and you will hear the moment each one opens.
Questions or feedback? Get in touch.