Text & Data Utility
Remove Duplicate Lines
Remove duplicate lines while preserving the first occurrence.
Method
Each line is compared against a set of previously seen keys. Optional trimming and case-insensitive comparison affect duplicate detection while the first original line is preserved in output.
Worked example
With case-insensitive comparison, apple, banana, apple, Banana, pear becomes apple, banana, pear.
Privacy
Your input is processed in your browser by Practical Tools Hub application assets. This tool does not need to upload your files or text to a third-party processing service.
Limitations
This works line by line and does not deduplicate words within a line. Case-insensitive comparison follows the browser locale.