Free tools
Clean CSV data in your browser
Find duplicates, missing values and extra spaces. Your file is processed in your browser.
No registration · You choose the next step
- 1. Your inputs
- 2. Result
- 3. Enquiry — optional
Your result
Enter your inputs and prepare a result. No contact details needed.
How to use the result
Example: remove duplicate supplier-catalogue rows using the product-code column.
The result supports discussion and independent evaluation. It is not a quote, delivery timeline or guarantee. Validate assumptions against real data.
Practical use
Before making a decision.
How do I choose the duplicate key?
If a product code identifies each record, choose that column number. If the whole row matters, leave the key field blank. Deduplication retains the first row, so check its values before exporting.
What happens to missing values and irregular rows?
The tool reports missing values without guessing or filling them. Irregular-width rows are reported, and existing extra columns are retained. Missing values are counted before selected row removals so you can assess original quality.
How is the original preserved?
Processing happens in the browser and the original file is unchanged. Download a separate result. Formula protection prefixes suspicious cells with an apostrophe; disabling it exports unprotected values. CSV contents are never attached to the contact enquiry.
Your chosen next step
Turn the result into a working solution.
Use the result independently. If you want our help, review the attached summary and submit an enquiry.
What will be attached to the enquiry?
No result yet.