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Format and clean CSV by normalising quoting, fixing line endings, and producing RFC 4180 compliant output. All formatting runs locally in your browser.
CSV formatting cleans and standardises the structure of a comma-separated values file. A formatted CSV has consistent quoting (fields containing commas, double quotes, or newlines are always quoted), normalised line endings (CRLF or LF), and no extra whitespace between columns. The result is a clean, RFC 4180 compliant CSV that any spreadsheet or data processing tool will parse correctly.
CSV Viewer Pro's formatter reads your CSV regardless of inconsistencies and produces a clean, normalised output. It handles quoted fields, embedded commas, escaped double quotes, and mixed line endings. After formatting, every field that needs quoting is quoted, and every field that doesn't need quoting is unquoted for readability.
Formatting CSV is particularly useful when combining CSV files from different sources, cleaning exports from databases or legacy systems, and preparing CSV for import into tools that require strict RFC 4180 compliance. All formatting runs locally — your data never leaves your browser.
RFC 4180 is the standard for CSV format. It defines rules for quoting, line endings, and field separators that all standard CSV parsers follow.
No. Formatting only changes quoting and whitespace — the actual data values remain exactly the same.
The formatter uses comma as the default delimiter. For semicolons, paste the content and use the editor to help fix any issues.
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