Comma Separator
Turn a column of items into a clean comma-separated list, instantly.
How to use Comma Separator
- Paste your column into the input — one item per line, straight from a spreadsheet or query result.
- Pick the delimiter — comma by default; switch to semicolon or pipe if that is what your target expects.
- Turn on quoting if the output is going into SQL, JSON or CSV, or if any item contains a comma.
- Copy the result — the converted list is ready to paste straight into your query, code or field.
What is Comma Separator?
What does a comma separator do? It takes a list with one item per line — the shape you get when you copy a column out of Excel, Google Sheets or a database result — and turns it into a single comma-separated line.
Paste this:
apple\nbanana\ncherry
Get this:
apple, banana, cherry
The reverse works too: paste a comma-separated line and get one item per row, ready to paste back into a spreadsheet column.
About the Comma Separator
The four options that cover almost every real use:
- Quote each item — produces
'apple', 'banana'for a SQLINclause, or"apple", "banana"for a JSON array or CSV field. - Choose the delimiter — comma, semicolon, pipe, tab or space. Semicolons matter in Europe, where Excel treats them as the CSV separator because the comma is the decimal mark.
- Trim whitespace — strips the stray spaces that survive a copy-paste and would otherwise become part of the value.
- Remove blank lines and duplicates — the two things that break an
INclause or an import.
Where this actually gets used: building a SQL WHERE id IN (...) from a column of IDs; turning a list of email addresses into something the To: field accepts; converting a spreadsheet column into a JavaScript or Python array; preparing a comma-separated keyword list for an ad platform or a meta keywords field.
One trap worth knowing: if your items themselves contain commas — company names like "Smith, Jones & Co" — a plain comma-separated list becomes ambiguous, and whatever reads it will split the name in two. That is exactly what the quoting option is for: quoted values keep internal commas intact, which is the rule real CSV parsers follow.
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