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CSV Cleaner / Formatter

Remove columns · delete empty rows · deduplicate · trim whitespace

Input CSVCSV
Lines: 0Chars: 0
Cleaned resultCSV
Lines: 0Chars: 0

Overview: CSV Cleaner / Formatter is a professional cleaner and normaliser for CSV tables. It rapidly performs common cleansing operations — trim whitespace, delete empty rows, deduplicate, drop unwanted columns — to prepare data before importing to Excel, a database or an analytics platform.

How to use: Step 1 — paste the CSV you want to clean on the left, or click "Sample" to load an example. Step 2 — the tool detects the header (first row) and shows every field as a "Remove columns" chip below; tick a chip to exclude that column from the output. Step 3 — tick cleansing rules in the options area: "Trim leading/trailing whitespace" removes surrounding whitespace from every cell, "Remove empty rows" drops rows whose columns are all empty, and "Remove duplicate rows" deduplicates by full row content (keeping the first occurrence). Step 4 — preview the result on the right, then copy or download it as cleaned.csv.

Typical scenarios: Clean up user or order tables exported from business systems by removing extra whitespace and empty rows caused by manual entry; pre-process data before analysis to remove duplicate samples and keep statistics accurate; normalise tables obtained from scrapers or packet captures; sanitise data before importing into a BI platform; process survey response tables.

Technical notes: Parsing follows RFC 4180 — double-quoted fields can contain commas and newlines. Deduplication is based on the string obtained by joining the whole row; if you want to dedupe by one column, remove the others first. A row counts as empty only when every column is an empty string. Removing a column drops the corresponding position from both header and data rows. The tool does not modify field case or infer types, keeping the original string form. Output uses CRLF newlines for Excel compatibility.

Privacy: All cleansing operations happen locally in your browser; the table data is never uploaded, making it safe to use with tables that contain personal information, order details or sales records.

Frequently Asked Questions

How do I use CSV Cleaner / Formatter?
Step 2 — the tool detects the header (first row) and shows every field as a "Remove columns" chip below; tick a chip to exclude that column from the output. Step 4 — preview the result on the right, then copy or download it as cleaned.csv .
What can CSV Cleaner / Formatter do?
Typical scenarios: Clean up user or order tables exported from business systems by removing extra whitespace and empty rows caused by manual entry; pre-process data before analysis to remove duplicate samples and keep statistics accurate…
Is my data private when I use CSV Cleaner / Formatter?
Privacy: All cleansing operations happen locally in your browser; the table data is never uploaded, making it safe to use with tables that contain personal information, order details or sales records. Privacy: All cleansing operations happen locally in your browser; the table data is never uploaded, making it safe to…
What technical details should I know about CSV Cleaner / Formatter?
A row counts as empty only when every column is an empty string. The tool does not modify field case or infer types, keeping the original string form.