Line Counter & Line ToolsCount total, empty and unique lines, then add line numbers, sort alphabetically, reverse or shuffle lines.
Remove Duplicate Lines
Paste a list of emails, keywords, URLs or names and get each entry only once. The first occurrence is kept, so the order of your list does not change unless you ask it to.
Runs entirely in your browser. Your input and files are not uploaded to any server.
How to use
- Paste your list, one item per line.
- Choose whether “Apple” and “apple” count as the same, and whether to ignore surrounding spaces.
- Copy or download the unique lines. The summary shows how many duplicates were removed.
Examples
Keyword list
“seo tools / SEO Tools / seo tools ” becomes one line with case-insensitive matching and trimming on.
URL list
Keep case-sensitive matching on because URL paths can be case-sensitive.
Privacy
Runs entirely in your browser. Your input and files are not uploaded to any server. See the privacy policy for what is stored in your browser (favorites and history only). Privacy policy
Check it yourself: open your browser’s developer tools, select the Network tab and use the tool. Your file never appears in an upload request. Once this page is saved for offline use, you can also disconnect from the internet and keep working. Ads and anonymous visit statistics, when enabled, make their own requests, but they never receive your files or text.
Frequently asked questions
Which copy is kept?
The first occurrence. Later duplicates are removed.
Can it remove all lines that appear more than once?
Yes. Choose “Only lines that appear once” to drop every line that has a duplicate.
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