How does Clean CSV work?

Drop duplicate and empty rows and trim stray whitespace. Add your files above, adjust anything you want to change, and press the button. The result downloads straight to your device.

Are my files uploaded anywhere?

No. This tool runs entirely in your browser. Your files are read into memory, processed on your device, and discarded when you close the tab.

Do I need an account?

No. Every tool on FileTools360 works without signing up, and there is no watermark on the output.

What is the file size limit?

100 MB per file. Since everything runs locally, your device's available memory is the real constraint.

SpreadsheetLosslessRuns in your browser

Clean CSV

Drop duplicate and empty rows and trim stray whitespace. The conversion is lossless — every pixel, sample or byte in the source is preserved.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

CSV, TSV, XLSX, XLS and 1 more formats · up to 100 MB each

or paste files from your clipboard

Ready when you are

Drop duplicate and empty rows and trim stray whitespace. Everything happens in this tab; nothing is sent anywhere.

⌘K to search converters

How to use it

1
Add your files
Clean CSV works with CSV, TSV, XLSX, XLS and ODS. Drop them in, browse for them, or paste from your clipboard.
2
Choose your options
Tune delimiter and header handling — or leave the defaults, which are sensible.
3
Run it and download
Press the button and save the result. Everything happens on your device, and nothing is uploaded.