LineUp

Put your list in order.

Paste a messy list. Clean it up. Copy it back.

LineUp is a local-first, single-screen browser utility for cleaning plain-text lists.

Mental Model

ONE LINE = ONE ITEM.

• Input: plain multiline text
• Output: plain transformed text
• Processing: 100% local in the browser
• Privacy: “Your list stays in your browser.” No remote tracking, no analytics, no local storage persistence.

Features

• Line normalization: Handles LF, CRLF, CR, and mixed line endings.
• Whitespace trimming: Trims leading/trailing whitespace without altering internal spaces or Unicode encodings.
• Empty line filtering: Optional removal of empty or whitespace-only lines with precise counter.
• Deduplication:
  • Off
  • Exact (case-sensitive)
  • Ignore case (case-insensitive, always preserves the first occurrence)
• Ordering:
  • Original
  • A → Z (natural, locale-aware sorting with Intl.Collator)
  • Z → A (reverse natural sorting)
  • Short → Long (by character length)
  • Long → Short (by character length)
  • Reverse
• Decoration:
  • Numbering presets (1., 1), #1)
  • Bullet presets (-, •)
  • Custom prefix and suffix
• Output delimiters:
  • New line
  • Comma
  • Semicolon
  • Custom delimiter

Development

# Install dependencies
npm install

# Start local dev server
npm run dev

# Run automated tests
npm test

# Build production bundle
npm run build

License

MIT