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.
Example
Input
red
green
blue Output
red, green, blue Blank lines are dropped rather than becoming empty entries, so a trailing newline will not leave a dangling comma.
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.