Join Lines
Join multiple lines of text into a single line with your choice of separator and optional quoting.
About This Free Online Join Lines
Our free online Join Lines tool concatenates all lines of your text into a single line (or your chosen structure). Choose from preset separators — space, comma, semicolon, pipe, or custom — and optionally wrap each item in single quotes, double quotes, or parentheses. Perfect for converting lists to comma-separated values, building SQL IN clauses, formatting array literals, or cleaning up multiline text for single-line use. All processing is done in your browser.
Features of Our Join Lines
- Join all lines into one line
- Preset separators: space, comma, semicolon, pipe, newline
- Custom separator option
- Quote options: none, single, double, parentheses
- Trim whitespace from each line
- Real-time preview
- 100% private — browser-only processing
How to Use the Join Lines
Using this tool is simple and requires no signup or registration. Follow these steps:
- Paste your multiline text into the input area.
- Choose your separator (comma, space, etc.).
- Optionally enable quoting around each item.
- Copy the joined output.
Frequently Asked Questions About Join Lines
What is this tool useful for?
Common uses include: converting lists to CSV, building SQL IN clauses (a,b,c), formatting arrays for code, and combining multiline text into a single line.
Can I trim whitespace from each line?
Yes. The "Trim lines" option removes leading and trailing whitespace from each line before joining.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.