Free tools
10 CSV tools, free and anonymous
Clean, merge, and convert your files in a click. Files processed in memory, never stored. No account required.
Check a CSV
Detect missing values, duplicates, malformed dates.
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Profile a CSV
Per-column stats: min, max, median, nulls, distinct.
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Merge 2 CSVs
Automatic join-key detection.
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XLSX → CSV
Convert an Excel file to CSV, sheet by sheet.
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Remove duplicates
Exact or fuzzy deduplication (case, whitespace).
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JSON ↔ CSV
Two-way conversion in a click.
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Diff 2 CSVs
Adds, deletes, and changes by key.
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Fix encoding
Repair mis-encoded characters (UTF-8, Latin-1…).
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Split a CSV
By row count or column value.
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Pivot table
Quick pivot: index × columns × values.
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