CSV / Spreadsheet Cleaner

Remove duplicate and blank rows, drop empty columns, trim whitespace, and normalize column names — CSV or XLSX.

Drop files here or browse

Processed on this device. Nothing is uploaded.

Supports CSV, XLSX · up to 100 MB

No signup
No watermark
No file leaves your device

How to clean CSV, XLSX files

Add your file
Drop CSV, XLSX files into the box above or click to browse. Nothing is uploaded — everything stays on your device.
Choose your options
Adjust the settings that appear once your files are added.
Click “Clean”
The processing runs locally in your browser. How long it takes depends on the file size and your device.
Download the result
Save the output straight to your device. We never keep a copy, because we never receive one.

Frequently asked questions

Is CSV / Spreadsheet Cleaner free?

Yes. Every browser tool is free, with files up to 100 MB on the free plan. Pro raises the limits to 2 GB.

Are my files uploaded anywhere?

No. CSV / Spreadsheet Cleaner runs entirely in your browser. Your files are processed in memory on your device and are never sent to a server.

Which formats are supported?

It accepts CSV, XLSX files and produces Same format as input.

Do I need an account?

No sign-up is needed. An account only adds extras like saved presets and higher limits.

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Popular spreadsheets conversions

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CSV / Spreadsheet Cleaner — Remove duplicate and blank rows, drop empty columns, trim whitespace, and normalize column names — CSV or XLSX. YallaConvert does the work locally: your files are opened and processed by your own browser, so there is no upload, no queue, and no copy of your document on anyone's server.

There's no watermark and no sign-up requirement — open the page, add your files, and download the result.