Online Comma Separator
The fastest online comma separator tool to convert newline lists into comma separated values — with semicolon, pipe, or dash delimiters. 100% free, private and runs in your browser.
Online comma separator — newline to delimiter in one click
Looking for an online comma separator that turns a newline list into a delimited string? FormatList is a free tool built for developers, data analysts, marketers and anyone who works with lists. Paste a column copied from Excel, Google Sheets, Notion or a database query, and get a clean separated value in milliseconds.
Choose from four delimiters: comma for CSV data,semicolon for European CSV formats,pipe for shell pipelines or config files, ordash for human-readable lists. Add single quotes, double quotes, or custom wraps around each value.
Why use this comma separator?
- Convert newline list to delimited values instantly.
- Wrap each value with single quotes, double quotes, pipes or a custom prefix & suffix.
- Deduplicate, trim whitespace and ignore empty lines automatically.
- One-click copy to clipboard — works on desktop and mobile.
- Runs fully in your browser, nothing is uploaded.
Common use cases
- CSV data — combine a column of values into a comma or semicolon separated line.
- Email lists — paste one address per line and get a delimited list ready for your mail client.
- Shell scripts — generate pipe-separated values for shell pipelines.
- API payloads — produce comma or pipe separated IDs for query parameters.
- Tags & keywords — turn a newline keyword list into a dash separated tag string.
How to use the comma separator
- Paste your newline-separated list into the input box on the left.
- Pick a delimiter: comma, semicolon, pipe, or dash.
- Optionally wrap each value with quotes or custom text.
- Toggle deduplicate, trim spaces or ignore empty lines as needed.
- Click Copy to copy the result to your clipboard.
Comma separator FAQ
What is an online comma separator?
An online comma separator is a browser tool that converts a list of values (usually one per line) into a single delimited string. FormatList supports comma, semicolon, pipe, and dash delimiters.
How do I convert newline to comma online?
Paste your newline-separated list into the input box. The output instantly shows the comma separated version. Click Copy to copy it to your clipboard.
How do I use semicolon as a separator?
Click the Semicolon tab above the output box. Each item will be joined with a semicolon — perfect for European CSV formats where comma is used as a decimal separator.
How do I use pipe as a separator?
Click the Pipe tab and your items will be joined with a pipe character (|). This is useful for shell scripts, config files, and data pipelines.
How do I use dash as a separator?
Click the Dash tab and your items will be joined with a dash (-). Great for plain-text keyword lists and human-readable output.
Can I add quotes or custom wraps around each value?
Yes. Use the Wrap items section to add single quotes, double quotes, pipes, or custom prefix/suffix around each value in any delimiter mode.
Is this tool free and private?
Yes, it is free to use with no signup and no upload — your data stays in your browser.