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Structured Data

CSV Cleaner

Paste or upload CSV to find malformed quoting, inconsistent column counts, stray whitespace, blank rows and delimiter problems. The cleaned result is ready to copy or download. Your data never leaves the page.

Runs in your browser v1.0.0

Cleaning options

live
Standard cleanup
More cleanup

Input CSV

original

Quoted fields, escaped quotes and line breaks inside quotes are supported.

Cleaned CSV

result

Read-only result. Copy or download it with the buttons above.

Diagnostics

waiting

    How it works

    Input is parsed locally with a quote-aware CSV parser. The diagnostics panel lists what looks wrong — unterminated or stray quotes, rows with a different number of columns, surrounding whitespace, blank rows, duplicate rows, empty columns, a UTF-8 BOM and mixed line endings. The cleaned result is written back as standards-compliant CSV with fields re-quoted only when needed. Nothing is sent to a server.

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