List Tools Tools

Set operations, filtering, and clipboard transforms for lists.

• List Stats

  Get statistics on any list: total count, unique count, min and max line length, average length, and the longest and shortest items. Useful for auditing data before further processing.

• List Set Operations

  Perform set operations on two lists: union, intersection, difference, A-only, B-only, and symmetric difference. Paste two lists and choose the operation — results update instantly.

• List Filter

  Keep or remove lines matching a plain-text substring or regular expression. Useful for filtering log output, cleaning data, or extracting matching lines from large lists.

• Comma to Lines Converter

  Convert between comma-separated values and one-item-per-line format. Handles quoted fields, trims whitespace, and removes duplicates. Paste CSV data, get a clean list — and back.

• List to JSON Array

  Convert a one-item-per-line list into a JSON array of strings and back again. Handles quoting and escaping automatically — useful for turning clipboard lists into API payloads.

• Column Picker

  Extract a specific column from tab-separated or comma-separated rows. Enter column index or name — useful for pulling a single field from TSV exports or pasted spreadsheet data.

• Prefix / Suffix Wrapper

  Wrap every line with a custom prefix and suffix. Useful for building SQL IN clauses ('value'), quoting shell arguments, wrapping HTML tags, or generating code from a list.

• Number Sequence Generator

  Expand range patterns like 1..100 or 0,2,4..20 into complete numeric lists. Supports step size, comma-separated output, and custom separators — great for test data and scripting.