Comma Separator
Turn a one-per-line list into a comma-separated string — with dedupe and quoting.
How to use the Comma Separator
- Paste your list, one item per line.
- Choose a separator, and optionally dedupe or add quotes.
- Copy the comma-separated result.
About the Comma Separator
The Comma Separator turns a plain list with one item per line into a single comma-separated string. It is the fast way to reshape data you copied from a spreadsheet column, a text file or a bulleted note into a format you can paste into code, a database query, a CSV field or a search box. Paste your list, and the joined result appears ready to copy, saving you from adding commas by hand.
A few options make the output fit exactly where it needs to go. You can choose the separator yourself if a comma is not what you want, remove duplicate items so each value appears only once, and wrap every item in quotes, which is handy when you are building an array or an SQL IN list. Combine these and a messy line-by-line list becomes clean, quoted, deduplicated output in one step.
Everything runs in your browser, so nothing you paste is uploaded and the tool works instantly even on long lists. It is a small utility, but it removes a genuinely tedious bit of manual editing. Turning the list into social tags instead? Try Text to Hashtags, or clean it first with Remove Duplicate Lines.
Frequently asked questions
What does the Comma Separator do?
It joins a list where each item is on its own line into one string separated by commas. It is useful for turning spreadsheet columns or plain lists into a format you can paste into code, queries or CSV fields.
Can I use a separator other than a comma?
Yes. You can choose the separator, so you are not limited to commas. This lets you build semicolon-separated lists, pipe-separated values or any other joined format you need.
Can it remove duplicate items?
Yes. There is a dedupe option that keeps only the first occurrence of each item, so repeated values in your list appear once in the output.
What does the quoting option do?
It wraps each item in quotes, which is handy when you are building a code array or an SQL IN list where each value must be quoted. You can combine it with dedupe and your chosen separator.
Is my list uploaded anywhere?
No. The tool processes your list entirely in your browser. Nothing you paste is sent to a server, so it works instantly and keeps your data private.