Comma Separator
Convert a list of lines into a comma-separated list, and back again.
Everything runs in your browser. Nothing you type is uploaded or stored.
About this tool
This handles the small, frequent chore of moving a list between formats: a column pasted out of a spreadsheet into a comma-separated list for a query, or a comma-separated string broken back into one item per line.
Quoting is optional, which matters when the result is going into code or a SQL IN clause.
How to use it
- Paste your list.
- Choose the direction — lines to comma-separated, or the reverse.
- Add quotes if the destination needs them, then copy.
Frequently asked questions
Is my text sent to a server?
No. Everything runs in your browser using JavaScript. Nothing you type or paste is uploaded, logged or stored anywhere.
Is there a length limit?
There is no fixed limit — the practical ceiling is your browser's memory. Documents of tens of thousands of words are handled comfortably.
Does it handle non-English text?
Yes. Text is treated as Unicode throughout, so accented Latin, Chinese, Tamil and emoji are all processed correctly rather than mangled.
Does it change my original text?
No. Your input stays exactly as you typed it; the result is produced separately so you can adjust the options and compare.