Convert Newlines to Commas
Advanced lines-to-CSV converter with sorting, formatting & more
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What is Convert Newlines to Commas?
Convert Newlines to Commas is a text formatting tool that joins separate lines into comma-separated format (CSV). Transform vertical lists into horizontal comma-delimited strings, perfect for creating CSV data, preparing lists for import operations, or converting line-based data into spreadsheet-friendly format.
Features
CSV Creation
Join lines into comma-separated format instantly.
Spacing Control
Add spaces after commas for readability.
Clean Output
Trim whitespace and remove empty lines.
Comparison Mode
View lines and CSV formats side-by-side.
File Upload & Download
Process text files and save CSV results.
100% Private
All processing happens locally in your browser.
Common Use Cases
Spreadsheet Import
Convert vertical lists to CSV for importing into Excel, Google Sheets, or databases. Create single-row data from multiline text for easy spreadsheet manipulation.
Email List Creation
Join email addresses from separate lines into comma-separated format for mailing list tools, CRM imports, or email marketing platforms.
Data Formatting
Convert vertical data to horizontal CSV format for APIs, configuration files, or any system expecting comma-delimited input.
Example: Create CSV List
banana
cherry
orange
Frequently Asked Questions
How do I convert a vertical list to CSV format?
Paste your multiline text (each item on its own line) into the input area. The tool automatically joins all lines with commas. Enable 'Add Space After Comma' for readable CSV format (e.g., 'apple, banana, cherry'). Download the result for use in spreadsheets or databases.
What does Add Space After Comma do?
Add Space After Comma creates ', ' (comma + space) between items instead of just ','. This produces more readable CSV: 'apple, banana, cherry' instead of 'apple,banana,cherry'. Most CSV parsers handle both formats, but spaced commas are easier to read.
Should I enable Trim Lines?
Yes, recommended! Trim Lines removes leading/trailing whitespace from each line before joining. This prevents issues like 'apple, banana ' (trailing space). Always enable this for clean, professional CSV output.
What does Remove Empty Lines do?
Remove Empty Lines skips blank lines in your input. Without this, blank lines create consecutive commas (,,,) in the output. Enable it to ensure only lines with content are included in the final CSV.
How do I create a CSV for spreadsheet import?
Paste your list (one item per line), enable all three options (Add Space, Trim, Remove Empty), and click Download. The resulting CSV file can be imported into Excel, Google Sheets, or any spreadsheet application as a single row or column.
Can I convert email addresses to CSV?
Yes! Paste email addresses (one per line) and they'll be joined with commas. Perfect for creating email lists for mailing tools, CRM imports, or contact management systems. Enable Trim and Remove Empty for clean output.
Is my data safe and private?
Yes, 100% safe. This tool runs entirely in your web browser using client-side JavaScript. Nothing you paste or upload is ever sent to our servers or stored anywhere. Perfect for sensitive data like customer lists or email addresses.
Can I upload a file to convert?
Yes! Click the 'Upload' button to load text files with multiline content. Each line will be joined with commas based on your selected options. Download the CSV result for use in other applications.
How can I verify the conversion?
Click the 'Compare' button to see your original multiline text on the left and the converted CSV format on the right side-by-side. The statistics panel shows exactly how many lines were processed and how many commas were added.
Can I convert this back to separate lines?
Yes! Use the Convert Commas to Newlines tool to reverse the operation, splitting the CSV back into separate lines.