Convert CSV to Markdown

Format support

The parser handles the full RFC 4180 CSV spec:

• Commas inside quoted fields — "Smith, John" stays one column.
• Line breaks inside quoted fields — multi-line cell content stays in one cell.
• Escaped quotes ("") — properly unescaped.
• Mixed line endings — \n, \r\n, and \r all work.

Output

The first row is always treated as the table header. A separator row (| --- | --- |) is inserted automatically below it so any Markdown renderer parses the output as a real table.

| Name      | Email             | Role      |
| --------- | ----------------- | --------- |
| Jane Doe  | jane@example.com  | Founder   |
| John Smith| john@example.com  | Engineer  |

Column widths in the output are padded so the source Markdown is readable in plain text too — not just when rendered.

Limitations

• Very wide tables (50+ columns) — render fine but become unwieldy in any Markdown view. Consider transposing or splitting.
• Very long values inside cells — Markdown tables don't wrap natively; consumers (GitHub, Notion) handle this differently.
• Delimiters other than comma — TSV (tab-separated) and semicolon-separated are NOT auto-detected. Convert your source to comma-separated first.

Privacy

Pure JavaScript parsing in your browser. No library load, no network call. Your spreadsheet data never leaves your device.