Free Comma Separator – Convert Lists to Any Delimiter

Reshape Any List Into the Format You Need

A comma separator converts a list of items from one delimiter format to another. You paste text that is separated by new lines, tabs, semicolons, or commas, pick the output delimiter you want, and copy the reformatted result. The core job is moving data between contexts that expect different separators: a spreadsheet column gives you one item per line, but your SQL query needs a comma-separated IN clause; a comma-separated config value needs to become separate lines for a bulk-import form. Doing this by hand on twenty items is tedious and on two thousand items is a guaranteed source of typos, which is why a dedicated tool exists for something that sounds trivial. Splitting is the first step. The tool recognizes commas, semicolons, tabs, and newlines as input delimiters and splits on whichever it finds, so you can paste messy mixed-format data and still get a clean item list. From that list, several transforms are available before the output is joined. Trim strips leading and trailing whitespace from each item. Remove-empty drops blank entries that appear when there are consecutive delimiters or trailing commas. Remove-duplicates keeps only the first occurrence of each unique value, and sort reorders items alphabetically or numerically. Finally, add-quotes wraps every item in single or double quotes — choosing double gives you items ready for a JSON array literal, and single gives you items formatted for a Python list or SQL string comparison. The output delimiter can be comma, newline, space, semicolon, pipe, or any custom string you type. Work through a real scenario. You copy a column of email addresses from a Google Sheet — one per line, 47 rows. Three are blank because of deleted rows, two are duplicates from a copy-paste mistake, and several have trailing spaces from the original import. You paste the column, enable trim, remove-empty, and remove-duplicates. The item count drops from 47 to 42. You choose comma as the output delimiter and enable double quotes. The output reads: "alice@co.com", "bob@co.com", ... — a clean, quoted, deduplicated list you can drop directly into a SQL IN clause or a JavaScript array without editing a single character by hand. Places this shows up routinely. A backend developer building a database seed script needs 200 country names as a comma-separated array with quotes. A QA engineer converting a column of test-case IDs into a comma-separated filter for a bug tracker search bar. A marketer reformatting a list of UTM parameters from a spreadsheet into semicolon-separated values for an analytics platform. A data analyst converting a CSV row back into separate lines so each value can be reviewed individually. A DevOps engineer turning a newline-separated list of server IPs into a comma-separated environment variable. A product manager preparing a Jira bulk-import by converting a line-per-item list into the tab-separated format the importer expects. A teacher converting a class roster from one-name-per-line into a single comma-separated string to paste into a mail-merge field. The most common surprise is that a trailing comma in your source produces one empty item at the end after splitting, which inflates the count by one. Enable remove-empty and it disappears, but if you leave it off, your output list has a trailing blank entry that may cause an error in code. A similar issue: items that look identical but have different internal whitespace — "Alice " versus "Alice" — are treated as duplicates only when trim is enabled, so always trim before deduplicating or you will get false unique counts. Everything processes in your browser; your list is never uploaded, stored, or sent anywhere, which makes it safe for customer emails, internal IDs, or any data you would not want on a third-party server.

🔥 Trending Tools