CSV Cleaner

Clean CSV, TSV, and text-delimited files by trimming whitespace, removing duplicate rows, and normalizing delimiters. Files are processed and deleted automatically.

Best for messy exports: Upload a CSV, TSV, or TXT file to trim spaces, remove duplicate rows, and rewrite it with a consistent delimiter.

Upload your file

Drop your CSV, TSV, or TXT file here or click to browse

Maximum file size: 25MB

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Choose cleanup settings

Input delimiter Use auto for most files unless you know the source separator is wrong. Output delimiter Choose how the cleaned file should be written back out. Treat first row as header Keeps the first row separate so duplicate removal only applies to data rows.

Trim whitespace Removes leading and trailing spaces from each field. Remove duplicate rows Removes exact full-row duplicates after any trimming step.

Clean the file

Please upload a CSV, TSV, or TXT file first.

Frequently Asked Questions

What does the CSV cleaner do?

It trims leading and trailing whitespace, removes full-row duplicates, and rewrites the file using a clean output delimiter.

Which file types can I upload?

You can upload CSV, TSV, or TXT files that use common delimiters such as comma, semicolon, tab, or pipe.

Can it detect the delimiter automatically?

Yes. Auto mode tries to detect the incoming delimiter, or you can force comma, semicolon, tab, or pipe yourself.

How are duplicates removed?

The current version removes exact duplicate rows after any trimming step is applied. If the first row is treated as a header, that row is preserved separately.

Can I convert a semicolon or tab file into standard CSV?

Yes. Choose the output delimiter you want and the cleaner rewrites the file with consistent separators.

Will it keep quoted values intact?

Yes. It uses Python's CSV parser and writer, so quoted fields and escaped separators are handled more safely than manual text replacement.

Are cleaned CSV files stored after download?

No. Files are processed temporarily to generate your output, then deleted automatically. Tiny File Tools does not require signup for these tools.