Remove duplicate rows from a CSV
Clean mailing lists, CRM exports and order files. Remove identical rows, or rows that share the same email, ID or any columns you pick.
- Processed on your device
- No sign-up
- No watermark
- Works offline
Coming soon · FileMoat Pro
Open, search and sort millions of rows
A spreadsheet viewer with no row limit — still running entirely in your browser.
How to
Remove Duplicates in three steps
- 1
Drop your CSV.
- 2
Compare whole rows, or pick the columns that define a duplicate (for example the email).
- 3
Download the cleaned file — the first occurrence of each row is kept.
FAQ
Good to know
Are my files uploaded to FileMoat?
No. The tool runs entirely inside your browser tab. Your files are read from your device, processed in memory and saved back to your device. Nothing is sent to our server — you can even disconnect from the internet after the page loads and it keeps working.
Which copy is kept?
The first occurrence, in the original order. Later copies are removed, and we tell you how many.
Are “Anna@Mail.com” and “anna@mail.com” duplicates?
With the “ignore case and extra spaces” option (on by default), yes. Turn it off for an exact, character-by-character comparison.
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