Duplicate Line Remover: Clean Lists and Logs Fast

Lists, logs, and exports often contain duplicate lines that clutter data or break imports. A duplicate line remover takes text with one item per line and deletes repeats so you get a clean, unique list.

When to use it

• Word lists: Remove repeated words before analysis or use.
• Log files: Strip duplicate entries to see unique events.
• CSV or plain lists: Clean data before importing into a spreadsheet or database.
• Code or config: Deduplicate lines when merging or cleaning files.

First vs last occurrence

• Keep first: The first time a line appears is kept; later duplicates are removed. Good when order matters and the first entry is the "main" one.
• Keep last: The last occurrence is kept. Useful when the latest value overwrites earlier ones.

Our Duplicate Line Remover works in your browser. Paste your list, choose first or last, and copy the result. Your data is never sent to our servers.