Join lines
ClientMerge lines with a delimiter—opposite of split text.
About Join lines
Merge multiline text with a comma, tab, or custom delimiter—local join opposite of split text. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.
How to use this page
Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.
Nearby workflows on Toolcore
- Split text — Split a string on comma, tab, custom delimiter, or newlines—one token per output line. for the next text or markup step in your edit loop.
- List converter — Convert lines ↔ JSON array ↔ CSV row—paste lists for configs, APIs, or spreadsheets; local only. for the next text or markup step in your edit loop.
- Trim lines — Strip leading and trailing whitespace on each line—optionally remove empty lines locally. for the next text or markup step in your edit loop.
- Sort lines alphabetically — Locale-aware A→Z / Z→A line sorts plus reverse—optional trim or case folding, browser-only. for the next text or markup step in your edit loop.
Common use cases
- Build a comma-separated row from a column of values.
- Create a single-line payload from multiline paste.
- Reverse a split-text workflow for quick CSV-style joins.
Common mistakes to avoid
Joining without trimming
Trailing spaces on lines become part of the output.
Expecting CSV escaping
Simple join only—use list converter for quoted CSV fields.
FAQ
Split first?
Use split text to break apart, then join with another delimiter.
JSON array?
Use list converter for lines ↔ JSON array.
Common search terms
Phrases people search for that match this tool. See the full long-tail keyword index.
- join lines with comma online
- merge multiline text delimiter
- combine lines into one string
- join text lines browser tool
More tools
Related utilities you can open in another tab—mostly client-side.
Split text
ClientSplit a string on comma, tab, custom delimiter, or newlines—one token per output line.
List converter
ClientConvert lines ↔ JSON array ↔ CSV row—paste lists for configs, APIs, or spreadsheets; local only.
Trim lines
ClientStrip leading and trailing whitespace on each line—optionally remove empty lines locally.
Sort lines alphabetically
ClientLocale-aware A→Z / Z→A line sorts plus reverse—optional trim or case folding, browser-only.