How to use
- Paste lines.
- Choose Ignore case / Trim spaces / Remove empty lines.
- Copy the unique lines or the removed ones.
Worked example
apple, Apple, banana, apple with Ignore case becomes apple, banana (2 removed).
Supported formats and limits
| Input | Text |
|---|---|
| Output | Text |
| Engine | Order-preserving set with normalization options |
Limitations
- Lines are compared exactly after the chosen normalizations.
- With Trim spaces on, the kept lines are also written without leading and trailing spaces.
Questions
Which copy of a duplicate is kept?
The first occurrence, in its original position. With Ignore case on, “apple, Apple, banana, apple” keeps apple and banana and removes 2 lines.
Can I see what was removed?
Yes. The Removed lines view lists each removed line with its line number and the line it repeats, and Repeated values lists every value that occurred more than once with its count. Both can be copied or downloaded.
Are blank lines treated as duplicates?
No. Blank lines are either all removed (Remove empty lines, on by default) or all kept as layout.
Privacy
Runs on your device. Files and text are processed in this browser tab and are not uploaded.
See the privacy policy for how toolsdocks handles data.