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Deduplicated Output
What This Tool Does
The Duplicate Line Remover keeps the first occurrence of each unique line and removes all subsequent duplicates. It supports case-insensitive comparison, whitespace trimming before comparison, optional alphabetical sorting, and removal of blank lines.
Frequently Asked Questions
Does the order of lines get preserved?
Yes — by default the first occurrence of each line is kept and subsequent duplicates are removed, preserving the original order. Enable the Sort option to alphabetically sort the deduplicated result.
What does case-insensitive matching do?
With case-insensitive matching enabled, "Apple" and "apple" and "APPLE" are treated as the same line and only the first occurrence is kept. Without it, they are treated as different lines.
What does trimming whitespace do?
Trimming removes leading and trailing spaces from each line before comparison. So " apple " and "apple" would be treated as duplicates. The output line retains its original whitespace.
Is my text sent to a server?
No. All processing runs in your browser. Nothing is transmitted anywhere.