Duplicate Line Remover
Remove duplicate lines, sort, trim and shuffle line by line.
Files and text are processed locally in your browser. Tools that must reach the network say so explicitly.
About the Duplicate Line Remover
Clean up a list by removing duplicate lines. The Toolcenter Duplicate Line Remover can match case-insensitively, trim whitespace, drop blank lines, and keep the first occurrence, the last occurrence, or only lines that appear exactly once. It can also sort or shuffle the result. Everything runs in your browser.
How to use it
- 1Paste your list, one item per line.
- 2Choose case sensitivity, trimming and blank-line handling.
- 3Pick which occurrence to keep and an optional sort order.
- 4Copy the de-duplicated result.
Key features
- Keep first, keep last, or keep only unique lines
- Case-insensitive matching option
- Trim whitespace and remove blank lines
- Optional A→Z, Z→A or shuffle sort
- Input/removed/output line counts
Frequently asked questions
How do I keep only lines that appear once?+
Set “Keep” to “only lines that appear once”. Every line that has any duplicate is removed entirely.
Can it ignore capitalisation?+
Yes. Enable case-insensitive matching so “Apple” and “apple” are treated as the same line.
Does it change the order of my list?+
By default it preserves order. You can optionally sort alphabetically or shuffle.
Is my list uploaded?+
No. De-duplication runs locally in the browser.
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