Separator ignored
Empty separator joins strings with no gap.
Fix: Use a space or comma for readable output.
Multi-line to Single Line
Flatten multi-line text into a single line with a configurable separator
Join with:
Input
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Output
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What is Multi-line to Single Line
Last reviewed:
Multi-line to Single Line removes every newline in your text and joins the remaining lines with a separator of your choice. Each line is trimmed before joining, and empty lines are skipped.
It is ideal for flattening database rows, joining CSV cells into comma-separated lists, and preparing multi-line log snippets for one-line chat or ticket comments.
Why use it
- Convert lists copied from spreadsheets into IN (...) SQL snippets.
- Flatten stack traces into single-line log entries.
- Compact multi-line JSON strings into one row.
- Move lists between tools that only accept inline values.
- Clean up formatting before pasting into chat or tickets.
Features
- Handles \n and \r\n
- Configurable separator
- Trims each line
- Skips blank lines automatically
- Multi-line to Single Line is handled entirely in-browser
How to use Multi-line to Single Line
- Paste multi-line text. Drop the text containing newlines.
- Set separator. Choose what to place between joined pieces.
- Run. Copy the single-line output into your destination.
Example (before/after)
Multi-line input
apple banana cherry
Joined with ', '
apple, banana, cherry
Common errors
Lost leading spaces
Each line is trimmed before joining.
Fix: Use the Single Line to Multi-line tool in reverse if you need strict whitespace.
FAQ
Are empty lines skipped?
Yes — blank lines are filtered out before joining.
Does it trim each line?
Yes, leading and trailing whitespace per line is removed.
What's the default separator?
A single space unless you change it in the control bar.
Can I use a tab separator?
Yes — paste a literal tab character into the separator field.
Does it handle Windows line endings?
Yes — both \r\n and \n are recognised.
Related tools
Pair with the reverse tool and list formatters for full round-trip workflows. You can also browse the full String Utilities category for more options.
Single Line to Multi-line
Split a single-line string on any delimiter to produce one value per line
List Formatter
Format newline-separated values into comma-separated lists, quoted values, JSON arrays, or SQL IN clauses with trim, dedupe, and sort options.
Remove Empty Lines
Remove empty lines from text
Remove Duplicate Lines
Remove duplicate lines from text
Sort Lines
Sort lines alphabetically or numerically
Find and Replace
Find and replace text patterns
Line Counter
Count lines in text
Line Shuffler
Randomise the order of lines in any multi-line text
Binary to Text
Convert binary to readable text
Hex to Text
Convert hexadecimal to text
Text to Binary
Convert text to binary
Text to Hex
Convert text to hexadecimal