How to use the List to Comma Separated
Convert your list to comma-separated values in three steps:
1
Paste your list
Paste one item per line into the input area.
2
Configure output format
Choose the output delimiter (comma, semicolon, pipe, space, tab, or custom), select a quote mode (none, single, double, or backtick), and toggle space-after-delimiter and trim options.
3
Copy the result
Click 'Convert to CSV' and copy or download the joined single-line output.
When to use this tool
Use to convert line-separated lists for SQL, APIs, and data workflows:
- →Converting a list of numeric IDs to a comma-separated string for a SQL IN clause: WHERE id IN (1, 2, 3)
- →Preparing a newline-separated list of values as a comma-separated parameter for an API or URL query string
- →Converting a column of values copied from Excel or Google Sheets to a comma-separated list for use in code
- →Joining a list of strings with single quotes for a SQL IN clause: IN ('apple', 'banana', 'cherry')
- →Creating pipe-separated or semicolon-separated values for configuration files or data interchange formats
- →Collapsing a multi-line list into a single line for embedding in a log message, JSON string, or email
Frequently asked questions
Q:How do I format output for a SQL IN clause?
For a SQL IN clause with numeric values (WHERE id IN (1, 2, 3)), paste your ID list, select Comma delimiter, enable space after comma, leave quoting as None, and click Convert. For a SQL IN clause with string values (WHERE name IN ('alice', 'bob')), select Single quote mode to wrap each item in single quotes automatically.
Q:What quote modes are available?
Four quote modes are available: None (no wrapping, e.g. apple, banana), Single quotes ('apple', 'banana' — standard for SQL), Double quotes ("apple", "banana" — standard for JSON and many programming languages), and Backticks (`apple`, `banana` — used in MySQL and some template literals). The chosen quote character is prepended and appended to every item.
Q:What delimiters can I use for the output?
Six output delimiter options are available: Comma (,), Semicolon (;), Pipe (|), Space, Tab, and Custom (any string you type). Comma is the default and most common. Pipe is useful for Markdown tables and certain data interchange formats. Semicolon is standard in European CSV conventions.
Q:What does 'Space after delimiter' do?
When enabled (the default), a space is added after each delimiter: 'apple, banana, cherry' instead of 'apple,banana,cherry'. This improves readability in most prose and code contexts. Disable it when you need the most compact output, such as for a URL query parameter or a tightly packed data field.
Q:Can I convert a multi-line list from Excel or Google Sheets?
Yes — copy a single column from Excel or Google Sheets and paste it into the input area. Each row becomes one line. Select your desired delimiter and quote mode, then click Convert. The output is the comma-separated string ready to use in code, SQL, or a formula.
Q:Does the tool handle items that already contain commas?
The tool does not automatically escape or quote items that contain the chosen delimiter character. If your items contain commas and you are joining with commas, enable the double-quote mode so each item is wrapped in quotes — this is the standard CSV convention for embedding commas inside values. For full CSV compliance with nested quotes, use a dedicated CSV editor.