Duplicate Line Remover
Remove duplicate lines from text instantly. Clean lists, logs, email lists and CSV fragments in one click.
Need to clean up whitespace-only lines? Try Remove Blank Lines. Want to fix messy spacing? Use the Remove Line Breaks. For full text cleanup, try Text Cleaner.
How to Use the Duplicate Line Remover
Paste text into the top box. Each line is treated as a separate item. Lines that are repeated are removed, keeping only the first occurrence. For email lists, place one email address per line.
Features
- Remove duplicate lines instantly
- Case-insensitive comparison option
- Trim whitespace before comparison
- Remove empty lines
- Preserves original input order
- Privacy-friendly — everything runs locally
Common Use Cases
Cleaning email lists
Remove repeated email addresses by placing one per line.
Cleaning CSV rows
Remove repeated rows from CSV fragments or lists.
Cleaning logs
Logs often contain repeated lines — dedupe them instantly.
FAQ
Does this remove duplicate words inside a line?
No — it removes duplicate lines. For duplicate items inside a line, place each item on its own line.
Does the order change?
No — the first appearance of each line is kept. Others are removed.
Does it work offline?
Yes — it runs entirely in your browser.