Text & Writing Utilities · Free tool
CSV Cleaner
Clean your messy CSV instantly by uploading it to trim whitespace, fix quotes, and dedupe rows. Works free in your browser, no signup needed.
Before
7
After
4
Removed
3
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What it does
A CSV cleaner that fixes the things that break imports: trims whitespace in every cell, collapses double quotes, normalizes line endings to \n, removes empty rows, dedupes rows by any column, and escapes stray commas inside fields. Drop a file or paste CSV, toggle the rules you need, and copy the cleaned output.
Pair with CSV viewer to check the before/after, or CSV to JSON if you need the cleaned data in JSON. When the file's really tab-separated, start with TSV to CSV.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/csv-cleaner" width="100%" height="720" frameborder="0" loading="lazy" title="CSV Cleaner" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Drop your CSV file or paste rows.
- Turn on the cleanups you need — trim, dedupe, normalize line endings.
- Pick a dedupe key column if you want row-level deduping.
- Copy the cleaned CSV or download it.
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