Remove Duplicate Lines
Remove duplicate lines from text
Features
Remove Duplicates
Filters out repeated lines and outputs only unique lines
Case-Sensitive Toggle
Choose whether 'Hello' and 'hello' are treated as duplicates
Trim Lines
Strips leading and trailing whitespace before comparing lines
Duplicate Report
Shows a ranked table of removed duplicate lines and their counts
Cleaning up lists
Whether you're deduplicating a CSV export, cleaning up a list of IDs from a database query, or consolidating copy-pasted log lines, this tool removes the repetition and keeps only the first occurrence of each unique line. Paste your text, click Remove Duplicates, and the output contains only unique lines in their original order.
Controls that matter
Case-sensitive mode treats Error and error as different lines. Turn it off and they're treated as the same. Trim Lines strips leading and trailing spaces before comparing, so lines that are visually identical but have inconsistent whitespace still get deduplicated. Remove Empty Lines cleans out blank lines at the same time.
The duplicate report at the bottom shows every removed line and how many times it appeared — useful when you're trying to understand how much repetition was in the original.