List to Comma Separated
Turn a list into a comma separated line, with optional quotes, brackets, dedupe and sorting.
Paste a list above to convert it.
How it works
Paste a list with one item per line and it is turned into a single comma separated line as you
type — no button to press. The tool trims stray spaces, drops empty lines and can remove
duplicates or sort the items alphabetically before joining them. Change Join with if you
need a semicolon, pipe, plain comma without a space or your own separator, and use the wrapping
options to quote every item and surround the whole list with brackets — handy for building a
JavaScript array, a SQL IN (…) clause or a CSV row. Items can also come in
separated by commas, tabs or spaces instead of new lines. Everything runs in your browser with
JavaScript, so e-mail addresses, IDs and other private lists never leave your device.
Frequently asked questions
How do I convert a list to a comma separated list?
Paste your list into the top box with one item per line — the comma separated line appears instantly below, no button to press. Spaces around each item are trimmed and empty lines are dropped by default, then you can hit Copy result or Download .txt. If your items arrive separated by commas, tabs or spaces instead of new lines, change the "Items are separated by" dropdown.
Can I put quotes around each item and brackets around the list?
Yes. "Wrap each item in" adds double quotes, single quotes or backticks to every item (any quote characters inside an item are escaped), and "Wrap the whole list in" surrounds the result with [ ], ( ) or { }. Combining them gives you a ready-to-paste JavaScript array like ["a", "b"] or a SQL IN ('a','b') clause in one step.
Is it safe to paste e-mail addresses or IDs into this converter?
Yes — the whole conversion runs in your browser with JavaScript. Nothing is uploaded, stored or logged, so private lists such as e-mail addresses, customer IDs, SKUs or keywords never leave your device. That is a real difference from most online list-to-comma tools, which post your text to their server.