Paste text to instantly remove duplicate lines. Choose to keep the first occurrence or remove all duplicates entirely. Optionally trim whitespace and ignore case.
A duplicate line remover scans text line by line and eliminates repeated lines, keeping only unique entries. This is essential for cleaning data exports, log files, lists, and any text that may contain unwanted repetition. Our browser-based tool offers options to trim whitespace before comparison and ignore letter casing, giving you precise control over what counts as a duplicate. It shows you exactly how many duplicates were removed. Since all processing happens locally in your browser, your data remains completely private and never leaves your device.
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.