Paste text to instantly remove duplicate lines. Choose to keep the first occurrence or remove all duplicates entirely. Optionally trim whitespace and ignore case.
Each line is compared against all other lines. When a duplicate is found, only the first occurrence is kept by default.
When enabled, 'Hello' and 'hello' are treated as the same line. The first occurrence's original casing is preserved.
When enabled, leading and trailing spaces/tabs are removed from each line before comparison, so lines that differ only by whitespace are treated as duplicates.
Yes, since processing happens in your browser, it can handle large amounts of text. Performance depends on your device's capabilities.