🧹 Remove Duplicate Lines
Paste your list, click Remove Duplicates, and get a clean unique-line result in seconds — with a count of how many duplicates were removed. No upload, no login, works offline.
About
Remove Duplicate Lines processes your text entirely in the browser — nothing is sent to a server. Paste any list (emails, URLs, keywords, names, or any line-separated text) and the tool instantly identifies and removes repeated lines, showing exactly how many duplicates were found. Four optional filters let you fine-tune the result: Ignore Case treats 'Apple' and 'apple' as identical; Trim Spaces strips leading and trailing whitespace before comparing; Remove Empty Lines clears blank entries; and Sort A–Z alphabetically orders the output. Because it runs 100% client-side, your data stays private and the tool works even without an internet connection.
How to use
- Paste or type your list into the input box — one item per line.
- Choose your options: Ignore Case, Trim Spaces, Remove Empty Lines, or Sort A–Z.
- Click Remove Duplicates to process the list instantly in your browser.
- Review the cleaned list and the count of removed duplicate lines shown below.
- Copy the result to clipboard or download it as a text file with one click.
FAQ
- Does this tool send my data to a server?
- No. All processing happens entirely in your browser. Your text never leaves your device.
- What does 'Ignore Case' do?
- When enabled, lines like 'Apple', 'APPLE', and 'apple' are treated as identical and only one is kept in the output.
- How many lines can I deduplicate at once?
- There is no hard limit. The tool runs in your browser and handles tens of thousands of lines comfortably on any modern device.
- Will 'Trim Spaces' change the content of my lines?
- Yes, leading and trailing whitespace is removed from each line before comparison and in the output. Content in the middle of a line is not affected.
- Can I use this to clean up email or URL lists?
- Yes. Paste any line-separated list — emails, URLs, keywords, product names, or any text — and the tool removes exact duplicates instantly. Enable Ignore Case for email lists to catch case variations.