Lists pasted from documents and spreadsheets arrive with duplicates, stray spaces and no useful order.
This tool cleans them in one place: trim the items, drop duplicates, optionally sort them, and then join everything into a comma line.
How to use Online Comma Separator
- Paste the items you want to clean, one per line.
- Turn on Trim, Remove duplicates or Sort A to Z as needed.
- Copy the cleaned, comma-separated line from the right panel.
What you can do with it
- De-duplicate a keyword list and comma-join it.
- Sort a list of names before turning it into a line.
- Tidy a pasted column of IDs into a clean comma list.
Good to know
Sorting changes the original order of your items, so leave it off when order matters, for example with ranked lists. Trim and dedupe never reorder the remaining items.
Frequently asked questions
How does Remove duplicates work?
It keeps the first time each item appears and removes later repeats, comparing items after trimming.
Does sorting affect numbers?
Sorting is alphabetical, so numbers are ordered as text. For strict numeric order, sort elsewhere first.
Is the original order kept otherwise?
Yes. Unless you turn on Sort, items stay in the order you pasted them.