Remove Duplicate Lines
Delete repeated lines from a list, with options to trim, ignore case and sort.
Result
✔ Done — what’s next?
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How to use the Remove Duplicate Lines
- Paste your list, one item per line.
- Choose options like "ignore case" or "sort".
- Copy the cleaned list.
Common use cases
- Clean an email or keyword list
- Find duplicate entries in a column copied from Excel
- Deduplicate log lines
Example
"apple, banana, Apple, banana" (one per line) with "Ignore case" gives "apple, banana" — 2 duplicates removed.
Remove duplicate lines from any list
Clean up email lists, keyword lists, product SKUs, log files or copied spreadsheet columns in one step. The tool keeps the first time each line appears and drops every later repeat, so your original order stays the same unless you choose to sort.
Turn on Ignore case to treat "Apple" and "apple" as the same line, and Trim spaces to ignore stray spaces before or after the text. Show only the duplicates does the opposite and lists the lines that appeared more than once, which helps you find double entries.
Frequently Asked Questions (FAQ)
Q: How many lines can it handle?
A: Hundreds of thousands. It uses a hash set, so even large lists are deduplicated almost instantly in your browser.
Q: Is my text uploaded?
A: No. Everything runs locally in your browser.
Q: Can I remove duplicate words instead of lines?
A: Put each word on its own line first (for example by replacing spaces with line breaks in your editor), then paste the list here.