CSV / TSV Converter

Properly escape and unescape CSV.

Mode

Tab-separated input

CSV output

Name,Comment,Tags
Ada Lovelace,"Pioneer of computing, wrote the first algorithm.","math, cs"
Lin Manuel,"He said ""raise a glass to freedom"".",music

CSV escaping rules per RFC 4180: wrap fields in quotes if they contain commas, quotes, or newlines. Double up internal quotes. Useful when generating CSV from data that has commas in addresses or quotes in comments.

About

Paste tab-separated data and get RFC 4180 compliant CSV. Or paste CSV with quotes and commas, get TSV back. Handles quoted fields, embedded quotes, and newlines correctly.

How to use

Pick direction.
Paste data.

FAQ

Why are some fields not quoted?+

RFC 4180 only requires quotes when a field contains commas, quotes, or newlines. Other values can stay unquoted. Excel sometimes adds unnecessary quotes; both forms are valid.