Join Lines
Combine multiple lines of text into a single line, using any separator you like. Perfect for turning a list into a comma‑separated string, merging addresses, or compacting data. Choose a separator, trim spaces, skip empty lines — the result updates instantly. No signup, no uploads, all private.
Why use this join lines tool?
When you have a list of items on separate lines and need to turn it into a single comma‑separated string, this tool does it in one click. It's the perfect companion to our Split Lines tool. And because it runs in your browser, your data never leaves your device.
- Multiple separator choices – comma, semicolon, pipe, space, tab, or any custom character.
- Whitespace cleanup – trim leading/trailing spaces from each line before joining.
- Skip blank lines – avoids extra separators caused by empty lines in the input.
- Instant preview – output updates as you type (with a short delay) or when you click Join.
- 100% private – all processing is done locally; no data is uploaded.
How to join lines (step‑by‑step)
1. Paste your lines
Drop the text with each item on its own line into the left box.
2. Choose separator
Pick the character that should go between each joined piece. If you need something unique, select Custom.
3. Set options
Trim spaces before/after each line, and skip empty lines to keep the output clean.
4. Copy or download
The joined text appears on the right. Use the buttons to copy it to your clipboard or save as a .txt file.
Example: creating a CSV row
| Input lines | Joined with comma + space |
|---|---|
| John Doe 30 New York | John,Doe,30,New York |
Common use cases
- CSV creation: Quickly turn a column of data into a single CSV row for spreadsheets.
- URL parameters: Join key‑value pairs with ampersands to build query strings.
- Command building: Merge file paths or arguments into a single terminal command.
- List conversion: Turn a checklist into a comma‑separated string for a database or config file.
Pro tips
- If you need the lines in a different order before joining, use our Text Sorter first.
- For a custom separator that includes multiple characters (like
,— comma followed by space), just type it in the Custom field. - The reverse operation is available in the Split Lines tool.