Multiline to Single Line Converter
This tool turns a column of values into a single delimited line — the operation you need every time a list copied from a spreadsheet has to become an SQL IN clause, a code array, a comma-separated query parameter or a configuration value. Each line can be wrapped before joining, so a column of IDs becomes a properly quoted list ready to paste rather than something needing another pass of manual editing. Blank lines are skipped and each entry trimmed by default, because a list copied out of a document almost always carries stray whitespace and empty rows that would otherwise become empty quoted entries.
How it works
Turns a column of values into one line — the operation you need every time a list from a spreadsheet has to become an SQL IN clause, a code array or a comma-separated parameter.
The wrap options put quotes or brackets around each value before joining, so the result is ready to paste rather than needing another pass.
Everything runs in your browser — nothing you paste is sent to a server.
0 characters on one line.
The spreadsheet-to-query problem
Somebody sends you a column of 200 order IDs in a spreadsheet and you need them in a query. Doing it by hand is twenty minutes of tedium and one missed quote away from a syntax error.
Copy the column, paste it here, set the separator to , and wrap each item in a single quote. The
result is a finished IN clause.
'ORD-1001', 'ORD-1002', 'ORD-1003'Other shapes
- JavaScript array — wrap with
"and join with,. - Query parameter — no wrapping, join with
,. - Shell arguments — no wrapping, join with a space.
- Spreadsheet row — join with
\tand paste across.
Why trimming matters
Values copied from a document carry trailing spaces you cannot see. Left in place, they end up inside the quotes and the query silently matches nothing. Trimming is on by default for that reason.
Frequently asked questions
How do I turn multiple lines into one?
Paste your column of values into the left panel. They are joined into a single line using your chosen separator.
How do I make an SQL IN clause?
Set the separator to ", " and wrap each item with a single quote on both sides. The output drops straight into an IN clause.
Can I use a tab or newline as the separator?
Yes. \t gives a tab and \n a newline; any other text is used exactly as typed.
What happens to blank lines?
They are skipped by default, since a blank line would otherwise become an empty quoted entry. Untick the option to keep them.
How is this different from removing line breaks?
This one builds a delimited list with optional quoting around each item. The remove line breaks tool unwraps hard-wrapped prose so it reflows as a paragraph.
Is my data uploaded?
No. Everything runs in your browser.
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