About Comma Separator Tool
Published: Last Updated:
Our free Comma Separator tool converts a vertical list of items (one item per line) into a comma-separated string. It also works in reverse — splitting a comma-separated string back into a clean vertical list. Ideal for SQL IN clauses, Excel/Sheets, and data imports.
Key Features
- Convert newline-separated list to comma-separated values.
- Convert CSV back to newline-separated list.
- Trim whitespace from each item.
- Optional quotes around each item (e.g., for SQL).
- Custom separator (comma, semicolon, pipe, tab).
- One-click copy to clipboard.
How to Use the Tool
- Paste your list (one item per line) into the input.
- Choose your separator character.
- Click 'Convert' to generate the output.
- Click 'Copy' to use the comma-separated result.
Core Benefits
- Instantly format data for SQL queries (IN clauses require comma-separated values).
- Prepare data for Excel or Google Sheets import.
- Convert between list formats without manual editing.
Common Use Cases
- Building SQL WHERE IN ('a','b','c') clauses from a list.
- Creating comma-separated tag lists for blog posts.
- Preparing mailing lists in CSV format.
- Converting Excel column data to a single comma-separated string.
Pro Tips
- Enable the 'Quote items' option when building SQL IN clauses.
- Use the semicolon separator for European-locale CSV files.
Use our free comma separator tool to instantly convert between vertical lists and comma-separated values. No spreadsheet required.