Part of Text tools: See all Text tools.
Join Strings: Join Strings merges multiple lines of text into a single line using a separator you choose — comma, semicolon, pipe, space, or any custom string. It is the reverse of splitting: turn a list into a compact, delimited string.
Quick steps
- Paste your multi-line text (one item per line) into the input area.
- Choose or type a separator — comma, semicolon, pipe, newline, or a…
- 'Join' to combine all lines into one string with the chosen separator…
- Copy the joined result for use in code, spreadsheets, or data imports.
Join Strings vs desktop software
| Feature | Join Strings | Desktop software |
|---|---|---|
| Install required | No | Yes |
| Works on phone & desktop | Yes | Varies |
| Free to use | Yes | Often paid |
| Signup needed | No | Sometimes |
People also ask
Can I join with a multi-character separator like ', ' (comma + space)?
Yes, type any string as the custom separator — including multi-character sequences like ', ' or ' | '.
Are empty lines included in the output?
By default, empty lines are skipped so you don't get double separators. You can toggle this to include empty entries if needed.
Can I wrap each item in quotes before joining?
Yes, there is an option to wrap each item in single or double quotes — useful for building SQL value lists or JSON arrays.
What happens if my text has trailing newlines?
Trailing blank lines are ignored by default, so the joined output won't have a dangling separator at the end.
Is this tool free?
Yes, Join Strings is completely free and processes everything locally in your browser.
What is Join Strings?
Join Strings merges multiple lines of text into a single line using a separator you choose — comma, semicolon, pipe, space, or any custom string. It is the reverse of splitting: turn a list into a compact, delimited string.
How to use Join Strings
- Paste your multi-line text (one item per line) into the input area.
- Choose or type a separator — comma, semicolon, pipe, newline, or a custom string.
- Click 'Join' to combine all lines into one string with the chosen separator between items.
- Copy the joined result for use in code, spreadsheets, or data imports.
Why use this tool?
Merging a list of emails, IDs, or values into a comma-separated string is a common task when building SQL IN clauses, API parameters, or CSV rows. This line joiner combines your list instantly without manual editing.
FAQ
- Can I join with a multi-character separator like ', ' (comma + space)?
- Yes, type any string as the custom separator — including multi-character sequences like ', ' or ' | '.
- Are empty lines included in the output?
- By default, empty lines are skipped so you don't get double separators. You can toggle this to include empty entries if needed.
- Can I wrap each item in quotes before joining?
- Yes, there is an option to wrap each item in single or double quotes — useful for building SQL value lists or JSON arrays.
- What happens if my text has trailing newlines?
- Trailing blank lines are ignored by default, so the joined output won't have a dangling separator at the end.
- Is this tool free?
- Yes, Join Strings is completely free and processes everything locally in your browser.
Join Strings — In-Depth Guide
String joining combines multiple text segments into a single string using a specified delimiter or separator. This is the inverse of splitting and is equally essential for data formatting. Use it to combine list items into comma-separated values, merge path components with slashes, or assemble formatted output from individual pieces of data.
Developers building SQL queries, URL parameters, or formatted strings frequently need to join arrays of values with specific separators. This tool lets you paste multiple lines and join them with any character or string, producing output ready for use in code, configuration files, or data imports. It handles the formatting tedium so you can focus on logic.
Data analysts use string joining to reconstruct formatted records from individual fields, create comma-separated lists for SQL IN clauses, or combine text fragments for report generation. The tool is especially useful when preparing data for systems that expect specific delimited formats different from your source data format.
Tip: when joining with commas for CSV output, consider whether any values contain the delimiter character and need quoting. For code generation, you might join with comma-space for readability. When joining file path components, use the appropriate separator for your operating system. Combine this tool with our Split String tool for reformatting delimited data.
Also try
Related tools that work well with this one: