In short: A comma separator converts a list with one item per line into a single line separated by commas (or any delimiter), optionally adding quotes — and can split a delimited line back into a column.
About List to Comma Separated Values
Spreadsheets give you data in columns, but many places want it on one line: an SQL WHERE id IN (…) clause, a tag field, an email “To” box or a config array. This converter joins lines with the delimiter you choose and can wrap each item in quotes, escaping any quotes inside.
Switch the direction to split a delimited line back into one item per line — handy for turning a comma-separated list of keywords or IDs into a column you can paste into a spreadsheet.
How to use List to Comma Separated Values
- Paste your list (one item per line), or a delimited line to split.
- Choose the direction, delimiter and quoting.
- Copy the result.
Examples
Lines 101 / 102 / 103 with single quotes and parentheses → ('101', '102', '103').
A column of keywords → seo, json, pdf tools for a CMS tag field.
Frequently asked questions
How are quotes inside items handled?
They are doubled (O'Brien → 'O''Brien'), which is the SQL and CSV convention.
Can I split on commas inside quotes?
Splitting respects double-quoted fields, so "a, b", c splits into two items.
Does it trim spaces?
Yes, each item is trimmed of leading and trailing whitespace.
Is my data uploaded?
No. Everything runs locally. You can check this yourself: open your browser’s developer tools, switch to the Network tab and use the tool — no request carries your input.
Updated November 2026 · Free, no signup · How we build and test tools