Join List Items
Join list items into a single string with a configurable separator
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About Join List Items
Combine List Items Into a Single String Effortlessly
You have a list of items, one per line, and you need them combined into a single string with a specific separator between each one. Maybe it is a comma-separated list for a SQL IN clause, a pipe-delimited string for a config file, or a semicolon-joined set of email addresses. The Join List Items tool does this instantly, saving you from tedious manual editing.
This is one of those micro-tasks that developers, data analysts, and writers encounter constantly. It takes just a few seconds with the right tool, but far too long without one. That is exactly why the Join List Items tool exists: to eliminate the friction of a task you should not have to think about.
How It Works
Paste your list into the input field. Each item should be on its own line. Choose your separator: comma, semicolon, pipe, tab, space, newline, or type a custom delimiter. Click join and the tool concatenates every item with your chosen separator between them. The result appears in the output area, ready to copy with a single click.
The tool also offers options to trim whitespace from each item before joining, remove empty lines, and optionally wrap each item in quotes. These small extras handle the most common follow-up edits people make after joining, so you get a perfectly formatted string on the first try.
Real-World Scenarios
Building SQL queries. You have a column of user IDs from a spreadsheet and need them in a SQL IN clause like IN (101, 102, 103). Paste the IDs, set comma as the separator, enable quoting if they are strings, and copy the result straight into your query editor.
Creating CSV rows. You have extracted individual values and need to assemble them into a single CSV line. Join list items with a comma separator and you have an instant row ready to append to a file.
Assembling email lists. Paste a list of addresses, join with semicolons, and paste into the BCC field of your email client. Done in three seconds.
Config file values. Many configuration formats use pipe-separated or colon-separated lists. Instead of manually placing delimiters, let the tool handle it.
Writing prose. You have a bullet list of features and need to turn it into a natural sentence like supports JPEG, PNG, WebP, and BMP. Use comma+space as the separator and tweak the last join manually, or use a custom final-item separator if available.
Why a Dedicated Tool Beats Manual Editing
You could do a find-and-replace in a text editor, swapping newlines for your delimiter. But that approach breaks when items have trailing spaces, when there are blank lines in the list, or when you need quoted values. The Join List Items tool handles all of these edge cases out of the box. It is purpose-built for this exact task, so it gets the details right every time.
Fast, Private, and Free
The entire operation runs in your browser. Your list data is never transmitted to a server. Whether you are joining five items or five thousand, the tool processes them instantly and delivers a clean, copy-ready result. Bookmark the Join List Items tool and you will use it more often than you expect.