About Comma Separated List

Convert any list format into a single delimited string, entirely in your browser.

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Why Nobu Tools?

Nobu is my dog, and the inspiration behind these tools. Life is short, so we should spend less time on tedious tasks and more time with the ones we love.

Nobu Tools are built to save you time. Fast, private, no-nonsense utilities that just work, so you can get back to what matters.

🔒 Privacy First

Your data stays yours. Everything runs locally in your browser using plain JavaScript:

No data is ever sent to any server. Your list stays on your device
No data is logged or stored. We can't see what you convert
Works completely offline. Once loaded, no internet needed
Handle thousands of items. Fast performance with large lists

⚡ How It Works

Comma Separated List parses your input according to the format you select, applies any text processing and sorting options, then joins everything together with your chosen delimiter.

Input (one per line)Apple Banana Cherry Date

Output (comma + space)Apple, Banana, Cherry, Date

Input Formats

Endline separated (default): Each line is treated as one item
Tab separated: Items separated by tab characters — great for spreadsheet data
Semicolon separated: Items separated by semicolons
Pipe separated: Items separated by | characters
Bulleted list: Lines starting with -, •, or * (copied from documents or notes)
Numbered list: Lines starting with 1., 2), etc.
Whitespace separated: Items separated by spaces or tabs on a single line
Quoted CSV: Standard CSV with quoted fields — handles commas and quotes inside values

Smart Format Detection

When you paste or type data, the tool automatically analyses it and shows a suggestion banner if a different input format would be a better fit. For example, if you paste a bulleted list while "Endline separated" is selected, it will suggest switching to "Bulleted list" mode so the bullet markers are stripped from your items.

Output Delimiter

, (comma + space) The default — produces a clean, readable list like: Apple, Banana, Cherry

, (comma only) Compact format with no spaces: Apple,Banana,Cherry

Custom delimiter Use any string — pipe, semicolon, " / ", " | ", " AND ", or anything you need

Quoting

Wrap items in quotes: Surrounds each item with double quotes — useful for SQL IN clauses, JSON arrays, or code
Escape quotes with \: When wrapping in quotes, any internal double-quote characters are escaped as \" so the output is valid for most programming languages

Text Processing

Trim whitespace: Remove leading and trailing spaces from each item
Skip empty items: Ignore blank entries in the input
Lowercase list: Convert every item to lowercase
Remove line breaks: Collapse newlines within items to spaces
Remove paragraph breaks: Collapse double-newlines (blank lines) to a single space
Remove extra spaces: Collapse consecutive spaces into one
Remove all whitespace: Strip every space, tab, and newline from each item

Output Options

Remove duplicates: Keep only unique items (first occurrence preserved)
Sort ascending: A → Z alphabetical order with natural number sorting
Sort descending: Z → A reverse alphabetical order
Reverse list: Flip the entire list end-to-start (applied after sorting)

💼 Use Cases

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SQL IN Clauses

Turn a column of IDs into "id1", "id2", "id3" ready for a SQL WHERE IN clause. Enable "Wrap items in quotes" and use comma delimiter.

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Email Recipients

Paste a list of email addresses (one per line) and get a comma-separated string for the To, CC, or BCC field.

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Meeting Notes

Convert bulleted action items or numbered lists from meeting notes into a compact inline list for Slack, Teams, or an email.

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Tags & Labels

Merge a column of tags into a single comma-separated field for CSV imports, CMS tagging, or metadata fields.

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Config & Environment Variables

Build comma-separated config values from a list. Use custom delimiters like : or ; as needed.

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Data Cleanup

Remove duplicates, sort, lowercase, and strip whitespace all in one step — then join into a clean list.

⌨️ Keyboard Shortcuts

Ctrl+Enter: Run conversion

❓ FAQ

Is my data sent to a server?

No. All conversion happens locally in your browser. Your data never leaves your device.

How many items can I convert?

The tool handles thousands of items with ease. It runs entirely in JavaScript with no network overhead.

Can I use a custom delimiter like " | " or " AND "?

Yes! Select "Custom delimiter" in the Output Delimiter settings and type any string. It will be placed between every item in the output.

How do I create a quoted list for SQL?

Enable "Wrap items in quotes" in the Quoting settings. Optionally enable "Escape quotes with \" if your data may contain double-quote characters. Use the comma-only delimiter for compact SQL-ready output.

What does the format detection do?

When you paste data, the tool analyses patterns like tab characters, bullet markers, numbered prefixes, and pipe characters. If it detects that a different input format would parse your data better, it shows a suggestion banner. You can apply the suggestion with one click or dismiss it.

Does it work offline?

Yes! Once loaded, no internet connection required.

Ready to Convert?

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