Line dedupe
Remove Duplicate Lines Online
Clean repeated lines while preserving the original order. This preset is tuned for newline-separated text, logs, code snippets, and pasted lists.
Line dedupe
A dedicated page for duplicate-line tasks
Newline is the default delimiter
Each line is treated as one item, so the output remains easy to scan and copy back into editors, terminals, spreadsheets, or documents.
Keeps order unless you choose sorting
The result preserves the retained line order by default, which is safer for logs, allowlists, blocklists, and configuration snippets.
Best for line-by-line cleanup
Paste lines
Each newline is treated as one item, matching the most common duplicate-line workflow.
Review counts
See total, unique, and removed counts as soon as you paste content.
Keep first or last
Use Keep Last when the last occurrence is the version you want to keep.
Remove duplicate lines FAQ
Can I find duplicate lines instead of removing them?
Yes. Use the Find duplicates preset or switch Show to Repeated values.
Can blank lines be removed too?
Yes. Turn on Remove empty lines in the visible cleanup options.
Popular tools
Open the duplicate remover for a specific task
These pages use the same browser-based tool, with presets and guidance tuned for common duplicate-removal tasks.
Duplicate remover
Duplicate Remover Online
Paste text, lists, or file contents and remove repeated items in your browser. Start with line deduplication, then adjust delimiters, sorting, case handling, or duplicate-only output when needed.
List dedupe
Remove Duplicates From a List Online
Clean comma-separated lists, pasted spreadsheets, tags, IDs, and short item lists. This preset starts with comma splitting and trims extra spaces automatically.
TXT and CSV
Remove Duplicates From TXT or CSV Files
Drop or upload a TXT, CSV, log, Markdown, or JSON text file and dedupe its contents locally in your browser.