Comma Separated Values Generator
Turn a column of items into a comma separated list — or split one back into lines. Custom separators, quoting, dedupe and trim options, all in-browser.
What is the Comma Separated Values Generator?
The Comma Separator converts a list with one item per line into a single comma-separated string — and converts delimited text back into a clean line-per-item list.
- Converts both ways: lines ⇄ comma separated values
- Custom separators: comma, semicolon, pipe, tab or your own
- Optional single or double quotes around each item
- Trim, dedupe and trailing-separator options
- Item counter so nothing gets lost
- 100% in-browser — nothing leaves your device
How to use the Comma Separated Values Generator
- 1
Choose a direction: lines to a separated list, or a separated list to lines.
- 2
Paste your items into the input box.
- 3
Pick the separator and toggle quoting, trimming, dedupe or a trailing separator.
- 4
Copy or download the converted result.
About the Comma Separated Values Generator
The Comma Separator converts a list with one item per line into a single comma-separated string — and converts delimited text back into a clean line-per-item list. It is the classic “make this a comma separated list” tool for building SQL IN clauses, tag fields, email recipient lists, code arrays and spreadsheet-ready values.
Both directions are fully configurable. Choose the separator (comma, comma + space, semicolon, pipe, tab or anything custom), optionally wrap each item in single or double quotes, add a trailing separator, trim whitespace around items and remove duplicates. Counters show how many items you are working with at each step.
Like every ByteTools utility, it runs 100% locally in your browser. Your lists are never uploaded, so client names, emails and internal data stay private, and the tool works offline.
Frequently asked questions
How do I turn a column from Excel into a comma separated list?
Copy the column, paste it into the input with the direction set to “Lines → separated list”, and the tool joins every row with your chosen separator. Add quotes if the target format needs them.
Can it make a quoted list for a SQL IN clause?
Yes. Select single quotes and the comma separator and each value comes out as 'value1', 'value2', 'value3' — ready to paste inside IN (…).
Can I split a comma separated string back into lines?
Switch the direction to “Separated list → lines”. The tool splits on your chosen separator, trims each item if you want, and puts one item on each line.
Does it remove duplicate items?
Optionally. Turn on “Remove duplicates” and repeated items are dropped after trimming, keeping the first occurrence of each.
Is my list uploaded anywhere?
No. The conversion happens entirely in your browser, so your data stays on your device and the tool works offline.
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