Line Joiner

📖 Tool Introduction

The Line Joiner is a free online multi-line merging tool built for the common task of taking a list where each item sits on its own row and turning it into a single continuous string: building a comma-separated SQL IN clause from a roster, gluing a keyword list into a tag string, flattening exported product names into one CSV row, or compressing the argument list inside a code snippet into one line. Stitching everything together by hand with separators is slow and prone to missing or doubling a comma. This tool splits your input by newline, then pastes the rows back together with the separator you choose. Common separators - comma, space, pipe, semicolon, newline and none - are one-click chips, and you can also type any custom character into the field; typing \n means a newline and \t means a tab. Beyond the separator between rows, you can wrap every row on both sides with your own characters - for example adding a pair of quotes turns a,b,c into "a","b","c". With skip-blank turned on, empty rows in the source are simply ignored. The monospace preview box in the middle shows the joined result live, along with how many lines became how many characters. The box at the bottom holds the complete result, ready to copy or download as a file. All processing happens locally in your browser, and no data is uploaded anywhere. A built-in example loads a realistic fruit list in one click, and the Ctrl+Enter shortcut runs the current setup without touching the mouse. Because nothing leaves your device, the tool is safe for private rosters and internal account lists, and it stays instant even when the source contains thousands of rows. Database administrators, script writers and spreadsheet users all reach for it whenever a vertical list needs to become a horizontal argument string, because one tap on the comma chip replaces a tedious manual paste-and-merge cycle.

✨ Key Features

• Common separators: comma, space, pipe, semicolon, newline and none, one tap each
• Custom separator: any character works, with \n and \t escape support
• Row wrapping: add left and right chars per row, e.g. to build a quoted list
• Skip blanks: empty rows are dropped so no stray separators appear
• Live preview: monospace box shows the join instantly with line and char counts
• Fully local: pure in-browser processing, zero upload of rosters or data

📝 How to Use

1. Paste your multi-line text into the input area, one item per line
2. Tap a separator chip or type your own separator in the field
3. Optionally type left and right wrap characters such as quotes
4. Watch the monospace preview box update with the joined result
5. When happy, click Copy Result or Download to save a TXT file

⚠️ Notes

• Empty input: pasting nothing produces no output at all
• Escape chars: type \n or \t in the separator field to mean newline or tab
• Blank rows: with skip-blank on, empty rows vanish without leaving stray separators
• Wrappers: wrap chars are added only outside each row, never inside the text
• Privacy: rosters and account data stay on your device, nothing is uploaded