Duplicate Line Remover
Input lines
1 lines
Duplicate Line Remover Online
Remove duplicate lines online from keyword lists, URL lists, email lists, CSV columns, exported data, search terms, and any line-based text. Paste once, choose how duplicates should be compared, then copy a clean list of unique lines.
Basic duplicate removers only return output. PC Notepad also shows duplicate groups, removed-line counts, blank-line cleanup, case matching, keep-first or keep-last behavior, and optional sorting before you copy the result.
Why it is different
Built for keyword lists, URLs, notes, and exported text
Remove duplicate lines
Paste a list and keep only unique lines while preserving the first or last occurrence.
List cleanup options
Trim each line, ignore case, remove empty lines, or sort unique output alphabetically.
Duplicate report
See which lines repeated and how many times each duplicate appeared before copying the result.
Private browser processing
Your lists are deduplicated locally in your browser and are not uploaded to a server.
How to remove duplicate lines
- 1. Paste a line-based list. Add keywords, URLs, emails, tags, IDs, names, or exported text where each item is on its own line.
- 2. Choose matching rules. Trim lines, ignore case, remove blanks, sort output, and decide whether to keep the first or last occurrence.
- 3. Review the duplicate report. Check which lines repeated and how many duplicates were removed before copying the unique output.
- 4. Continue cleaning. Use the Text Cleaner for extra spaces, HTML, wrapped PDF text, blank lines, and deeper cleanup, or use Sort Lines to alphabetize the final unique list, or Find and Replace to update repeated terms, or Text Compare to compare lists before and after deduping.
Useful for SEO and content workflows
Use it to dedupe keyword exports, combine lists from multiple tools, clean repeated search terms, remove duplicate URLs, or prepare unique lines before counting words and checking drafts.
Open Word CounterTrust and testing
Built and tested for browser-based text processing
The Duplicate Line Remover runs locally in your browser. We test it with empty input, keyword lists, long URL lists, blank lines, uppercase/lowercase variants, keep-first and keep-last behavior, sorting, duplicate reports, mobile layouts, and copy behavior before publishing updates.
Learn more about how PC Notepad works on the About page and how browser data is handled in the Privacy Policy.
Frequently asked questions
How do I remove duplicate lines online?
Paste your list into the tool. The duplicate line remover instantly keeps unique lines and shows how many duplicates were removed. You can copy the unique output with one click.
Can it remove duplicates from a keyword list?
Yes. It works well for keyword lists, URL lists, email lists, CSV columns, exported text, and line-based data.
Can I ignore uppercase and lowercase differences?
Yes. Enable Ignore case to treat lines such as Notepad App and notepad app as duplicates.
Can I keep the last duplicate instead of the first?
Yes. Choose Keep last if the latest occurrence should be preserved. Choose Keep first to preserve the original order.
Does this remove duplicate words too?
This tool is focused on duplicate lines and lists. For repeated words inside a paragraph, use the Text Cleaner first or split the text into line-based items before deduping.
Is my list uploaded?
No. Duplicate detection happens locally in your browser on your device. PC Notepad does not receive the text you paste into the tool.