Sheet Cleaner

Fix messy Excel and CSV files right in your browser.
Your file is never uploaded — everything runs inside this tab.

Drop an Excel (.xlsx) or CSV file here, or click

Remove duplicate rows — turn off for transaction/history data where repeated rows are valid

Is my data safe?

Where does the processing happen?: In this very browser tab. Opening, cleaning, and rebuilding your file all run on your computer. Nothing is sent to any server.
Is my file stored on a server or database?: No. This tool has no upload server and no database. Close the tab and the file is gone from memory.
I want to verify that myself: Open DevTools (F12) → Network tab, then process a file. You will see zero outgoing requests carrying your data.

Need heavier cleaning?

Unifying inconsistent names, inferring formats, huge files, merging multiple sheets — work automation can't finish gets reviewed and delivered by a human, with a change-tracking report.

See how the studio works →