List Converter

Convert between plain line lists, comma-separated values, JSON arrays, and quoted formats. Trim entries and remove empties.

Files and content are processed locally in your browser and are not uploaded to our server.

About this tool

Transform list data between common formats: one item per line, comma-separated, JSON array, or quoted CSV-style strings. Options trim whitespace and drop empty entries so exports paste cleanly into code, spreadsheets, or config files.

Features

Line list, CSV, JSON array, and quoted output
Trim whitespace on each item
Skip empty lines automatically
Copy or download converted output

How to use

Paste source list: Enter lines, CSV, or JSON depending on input mode.
Pick output format: Select the target structure and formatting options.
Convert: Click Convert and copy the result into your project.

Examples

Turn a line-based email list into a JSON array for APIs
Convert spreadsheet CSV columns to newline lists
Generate quoted strings for SQL IN clauses
Prepare tag lists for frontmatter YAML

Limitations

CSV parsing is line-oriented, not full RFC 4180 with embedded newlines
Special characters in JSON output are properly escaped
The text entered in the tool is processed directly in your browser and is not sent to a server.

FAQ

Can I paste a JSON array as input?: Yes. Select the appropriate input mode to parse JSON arrays back to lines or CSV.
Are quotes added automatically?: Quoted output modes wrap each item; plain CSV mode does not add quotes unless needed.
What happens to blank lines?: Empty entries are removed when trim/skip-empty options are enabled.