Lines to Comma List
Convert newline-separated values into a comma-separated list instantly — turn columns into CSV-ready rows. Free, client-side list converter tool.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
0 / 100M Limit
Common Use Cases
Building code lists
Convert a column of values into the comma-separated form for array literals and enum definitions.
Preparing email recipients
Turn a list of addresses into the comma-separated string a To: field accepts.
Compacting spreadsheet columns
Merge a column into one CSV cell for import formats that want delimited values.
Frequently Asked Questions
- How are lines joined?
- Each non-empty line is joined with a comma and space — three lines "a", "b", "c" become "a, b, c". Empty lines are skipped so stray blank rows do not produce double commas.
- When do I need a comma-separated list?
- Building CSV rows from a column of values, preparing argument lists for code or config files, pasting recipient lists into email clients, and compacting spreadsheet columns into a single cell.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.