Line Sorter & Deduplicator
Sort, deduplicate and clean up lists of text instantly. Your data never leaves your browser.
Input
Output
What is Line Sorter & Deduplicator?
This tool cleans up any list of text pasted one item per line — email lists, log entries, IDs, URLs — by sorting them, removing duplicate or empty lines, and trimming stray whitespace. It's a faster alternative to writing a one-off script or spreadsheet formula every time you need to tidy up a plain-text list.
How to use Line Sorter & Deduplicator
- Paste your list into the Input panel, one item per line (or click Paste / Example).
- Choose a Sort order and a Remove duplicates mode from the dropdowns above.
- Toggle Remove empty lines, Trim whitespace, or Reverse final order as needed.
- Read the cleaned list in the Output panel, and click Copy or Download to grab it.
How line sorting & deduplication works
Paste any list of lines — IDs, URLs, emails, log entries — and this tool applies your chosen options in a fixed order: trim whitespace, remove empty lines, remove duplicates, sort, then (optionally) reverse. For example, starting from this messy input:
// Before banana apple Cherry banana Mango Ada ada grape // After (Sort: A → Z, Dedupe: case-insensitive, Remove empty: on, Trim: on) Ada apple banana Cherry grape Mango
Notice "banana" (an exact duplicate) and "ada" (a case-variant duplicate of "Ada") are each removed down to one occurrence, the blank line is gone, and "Mango"'s trailing spaces are trimmed before deduplication and sorting run — otherwise "Mango " and "Mango" would have been treated as different lines. Everything runs with native JavaScript in your browser; no data is uploaded anywhere.
Frequently asked questions
Is it safe to paste sensitive data into this tool?
Yes. All processing happens in your browser using native JavaScript; no data is ever sent to a server.
How does "Numeric" sort handle lines that aren't numbers?
Lines that start with a number are compared by that numeric value, so "2" correctly sorts before "10". Lines that don't start with a number can't be compared numerically, so they're placed after all numeric lines and sorted alphabetically among themselves.
What's the difference between case-sensitive and case-insensitive duplicate removal?
Case-sensitive treats "Foo" and "foo" as different lines. Case-insensitive treats them as duplicates and keeps only the first one it sees. It's an explicit three-way choice (off / case-sensitive / case-insensitive) so you always know which behavior you're getting.
Does it handle very large lists?
Yes. Deduplication uses a Set for O(n) lookups instead of comparing every line against every other line, so lists with several thousand lines still process instantly.