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Line Tools: Remove Duplicates & Sort

Clean up lists of names, emails or keywords in seconds: remove duplicates and blank lines, sort or shuffle, number them, or join them into one line.

100% freeRuns in your browserNo sign-up

A complete toolkit for lists

Whether it's a class roster, email addresses for a campaign, SEO keywords or phone numbers, cleaning and sorting lists by hand takes ages. This tool gathers the most common list operations in one place and runs them on thousands of lines instantly.

What you can do

  • Remove duplicate lines: optionally ignoring case and spacing, so “Ahmed” and “ahmed ” count as duplicates.
  • Remove empty lines and trim extra spaces on every line.
  • Sort: A→Z or Z→A with natural ordering, numerically, or by line length.
  • Shuffle: randomize contestants or distribute tasks fairly using a secure random generator.
  • Numbering: add or remove sequential numbers.
  • Prefix and suffix: wrap each item in quotes or append a comma.
  • Join and split: turn a list into one comma-separated line, or the reverse.

Practical examples

  1. Turn a keyword list into a comma-separated line for ad platforms: paste and click “Join”.
  2. Prepare values for a SQL query: add the prefix ' and suffix ', to each line.
  3. Remove duplicate emails from a subscriber list before sending a newsletter.
  4. Alphabetize student names before printing an attendance sheet.

Every action can be undone, and everything runs in your browser — your lists are never sent anywhere. Need to pick a random winner? Try the Spin the Wheel tool.

Real-world examples

Line tools save hours of manual work on repetitive tasks. A few common scenarios:

  • Mailing lists: collected emails from several sources? Remove duplicates and sort alphabetically before importing.
  • Keyword research: strip blank lines and repeats from a keyword list before analysis.
  • Student or participant names: sort the list, then pick a random winner with Spin the Wheel.
  • Excel data: copy a whole column, process it here, then paste it back.
  • Code and logs: number or reverse lines to make review easier.

A note on sorting

Alphabetical order depends on language rules: accented letters, Arabic hamza forms and mixed scripts all need special handling. We use the browser's locale-aware comparison, which follows these rules, and lines starting with numbers can be sorted numerically (2 before 10) rather than as text.

Frequently Asked Questions

Does sorting handle numbers inside text naturally?

Yes. We use natural ordering, so “item 2” comes before “item 10”.

How many lines can it handle?

Tens of thousands of lines without trouble, instantly.

Is the shuffle truly random?

Yes. It uses the Fisher–Yates algorithm with the browser's cryptographically secure random generator.

How do I turn a list into one comma-separated line?

Type the separator in the “Separator” field and click “Join”.

Can I undo?

Yes. “Undo” steps back one action at a time.

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