How do I turn a column of data into a comma-separated list?

Paste your column into the input box, one value per line, and the comma-separated string appears in the output instantly. Three lines reading apple, banana, cherry become apple, banana, cherry on a single line. If you pasted straight from a spreadsheet, turn on Trim each item so stray tab or space characters at the ends are stripped, and Skip blank lines so an empty row in the middle does not leave a dangling comma.

How do I add quotes to each item for a SQL IN clause?

Set Quote to single quotes and Delimiter to comma plus space, then every item is wrapped like 'apple', 'banana', 'cherry'. To get the full clause, set Prefix to ( and Suffix to ) on the whole output, or just paste the quoted list between IN ( and ). For ID columns that are numbers, leave quotes off so you get IN (1, 2, 3). The item count under the output tells you how many values you are matching against.

Can it remove duplicates and sort the list?

Yes. Turn on Remove duplicates and any repeated line is kept only once, comparing items after trimming so apple and apple with a trailing space count as the same. Sort offers alphabetical (dictionary order, A to Z) and numeric (1, 2, 10 instead of 1, 10, 2) plus None to keep your original order. Dedupe and sort run before the items are joined, so the final string is already clean.

How do I split a comma string back into separate lines?

Switch the direction toggle to Split. Paste a delimited string like red, green, blue and it breaks apart on the delimiter you chose, giving you one item per line. This is handy when someone sends you a CSV-style cell and you want to scan it as a vertical list, or feed it into another tool that expects one entry per row. Trim each item also applies in this direction so the split pieces come out clean.

Should I use a Chinese comma or an English comma as the delimiter?

For code, JSON, SQL or CSV, always use the English half-width comma — a full-width Chinese comma (，) will break parsers and look wrong in a database query. Use the Chinese comma only when the output is prose meant for Chinese readers. The custom delimiter field lets you type either one, so paste a 、 (Chinese enumeration comma) there if you are building a readable Chinese list, or stick with the comma plus space preset for everything technical.

Build a SQL IN clause from a spreadsheet column

You have 80 order IDs in a spreadsheet column and need to query them all at once. Copy the column, paste it in, and you get 1001, 1002, 1003 ready to drop into WHERE id IN (...). For a string column like email or SKU, set the quote to single quotes and every value comes out as 'a@b.com', 'c@d.com'. Turn on dedupe so a duplicated ID does not bloat the query, and the item count confirms you are matching exactly the number of rows you expected.

Turn a list of tags into a CSV cell or config value

A blog post has tags written one per line in your notes. Paste them, pick comma plus space, and you have react, typescript, testing ready to drop into a front-matter tags field or a config line. Add a prefix and suffix of square brackets and you get a bracketed array string in one step, no hand-typing of separators that always ends with a stray comma at the end.

Flatten a copied column for a chat message or email

Someone asks for the list of people on a project and you have it as a vertical column. A 12-line column reads as a wall in chat, but Alice, Bob, Carol on one line is scannable. Convert, trim each item to kill the spreadsheet whitespace, copy, and paste a clean sentence instead of a block that wraps awkwardly across the message.

Split a delimited cell back into rows for review

A CSV export crammed five values into one cell separated by semicolons. Switch to split mode, set the delimiter to semicolon, and you get one value per line so you can read, sort, or paste them into separate spreadsheet rows. It is the reverse of the join, useful any time a single field is hiding a list you actually need to see broken apart.

List to Comma Separated — Quotes, Prefix, Dedupe, Sort

Turn a column of lines into a comma-separated string — add quotes, prefix/suffix, dedupe, sort, or split it back — browser-only

Runs locally
Category Text
Best for Removing repetitive cleanup work from everyday writing and operations.

Direction

Delimiter

Quote each itemSortPrefixSuffix

Remove duplicatesTrim each itemSkip blank lines

Input

Output (0 items)

What this tool does

Free list-to-comma-separated converter. Paste a column of lines (one item per line) and get a single delimited string back instantly. Pick the delimiter — comma, comma plus space, semicolon, pipe, space, or your own custom character. Wrap every item in single or double quotes, and add a prefix and suffix so each item comes out as ('apple') or [tag]. Clean the list as it converts: trim each item, drop blank lines, remove duplicates, and sort alphabetically or numerically. The most common job this does is building a SQL IN (...) clause from a pasted column, or turning a spreadsheet column into a tag string. Flip the direction and it splits a delimited string back into one item per line. Live output with an item count and one-click copy. Everything runs in your browser, nothing is uploaded.

Tool details

Input: Text + Numbers; The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
Output: Live result + Copy; The result area focuses on usable output, with copy, download, or preview actions when supported.
Privacy: Browser-side processing; The main tool logic does not call an external API, so inputs normally stay in the current tab.
Save / share: Shareable URL state; Key settings are encoded in the URL so another person can reopen the same setup.
Performance budget: Initial JS <= 9 KB; No WASM budget is declared, keeping the tool quick to open on mobile.
Best fit: Text · Developer; Category and role tags drive related tools, internal links, and quick fit checks.

How to use

1. Input

Paste or drop your content into the tool panel.
2. Process

Click the button. All processing is local in your browser.
3. Copy / Download

Copy the result or download to disk in one click.

How List to Comma Separated fits into your work

Use it to clean, compare, reshape, or extract plain text before it goes into a document, CMS, spreadsheet, or prompt.

Text jobs

Removing repetitive cleanup work from everyday writing and operations.
Making text easier to compare, paste, publish, or feed into another tool.
Working with content locally when the text is private or unfinished.

Text checks

Scan for unintended whitespace, duplicate lines, and lost punctuation.
For long text, test the first few lines before applying the whole change.
Copy the final output only after checking the preview.

Good next steps

These links move the current task into a more complete workflow.

Real-world use cases

Build a SQL IN clause from a spreadsheet column
You have 80 order IDs in a spreadsheet column and need to query them all at once. Copy the column, paste it in, and you get 1001, 1002, 1003 ready to drop into WHERE id IN (...). For a string column like email or SKU, set the quote to single quotes and every value comes out as 'a@b.com', 'c@d.com'. Turn on dedupe so a duplicated ID does not bloat the query, and the item count confirms you are matching exactly the number of rows you expected.
Turn a list of tags into a CSV cell or config value
A blog post has tags written one per line in your notes. Paste them, pick comma plus space, and you have react, typescript, testing ready to drop into a front-matter tags field or a config line. Add a prefix and suffix of square brackets and you get a bracketed array string in one step, no hand-typing of separators that always ends with a stray comma at the end.
Flatten a copied column for a chat message or email
Someone asks for the list of people on a project and you have it as a vertical column. A 12-line column reads as a wall in chat, but Alice, Bob, Carol on one line is scannable. Convert, trim each item to kill the spreadsheet whitespace, copy, and paste a clean sentence instead of a block that wraps awkwardly across the message.
Split a delimited cell back into rows for review
A CSV export crammed five values into one cell separated by semicolons. Switch to split mode, set the delimiter to semicolon, and you get one value per line so you can read, sort, or paste them into separate spreadsheet rows. It is the reverse of the join, useful any time a single field is hiding a list you actually need to see broken apart.

Common pitfalls

Leaving quotes on a numeric ID column. IN ('1', '2') compares numbers as strings, which is slower and can miss rows or throw type errors in strict databases. For integer keys, set the quote to none so you get IN (1, 2). Only string columns need the quotes.
Forgetting to skip blank lines. An empty row in the middle of your pasted column turns into an empty item, so you get apple, , banana with a gap. That trailing or middle empty value breaks a SQL IN and looks wrong in a CSV. Turn on Skip blank lines before you copy.
Using a full-width Chinese comma in code or a query. The character ， looks like a comma but parsers and databases do not treat it as a separator, so the whole string becomes one value. Use the English comma preset for anything technical and reserve the Chinese comma for prose.

Privacy

The conversion — joining your lines, adding quotes, the dedupe, the sort, and the reverse split — is plain JavaScript running in your browser tab. Your list never leaves the page and nothing is logged. One caveat: the shareable URL encodes your input and options in the query string, so a link pasted into chat will record those values in the recipient server's access log. If the list contains internal IDs, emails or anything sensitive, use the copy button and paste the text rather than sharing the URL.

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List to Comma Separated — Quotes, Prefix, Dedupe, Sort

What this tool does

Tool details

How to use

1. Input

2. Process

3. Copy / Download

How List to Comma Separated fits into your work

Text jobs

Text checks

Good next steps

Real-world use cases

Build a SQL IN clause from a spreadsheet column

Turn a list of tags into a CSV cell or config value

Flatten a copied column for a chat message or email

Split a delimited cell back into rows for review

Common pitfalls

Privacy

FAQ

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