Remove Duplicate Lines
Paste text with duplicate lines and instantly get unique lines only. Control case sensitivity, whitespace, and sorting.
Frequently Asked Questions
How does this tool remove duplicate lines? â–¼
The tool reads each line and keeps only the first occurrence of each unique line. All subsequent identical lines are removed. The order of first-seen lines is preserved unless you enable sorting.
What does the case-sensitive option do? â–¼
When case-sensitive is on, "Hello" and "hello" are treated as different lines. When off, they're treated as the same and only the first occurrence is kept.
What does trim whitespace do? â–¼
When enabled, leading and trailing spaces and tabs are removed from each line before comparison. So " hello " and "hello" would be treated as duplicates.
Can I sort the results? â–¼
Yes. Enable the "Sort output" toggle and the unique lines will be sorted alphabetically.
Is my text sent to a server? â–¼
No. All processing happens entirely in your browser. Your text never leaves your device.