Remove duplicate lines from text online for free. Clean up lists, logs, and data files by eliminating repeated lines instantly. No signup required.
First time here? Paste your text with duplicate lines Your input is processed locally and disappears when you close the tab.
Repeated entries creep into email lists, CSV exports, log files, and keyword sheets, and finding them by hand is tedious. Our free tool to remove duplicate lines online scans your text and strips every repeat in an instant, keeping the first occurrence and preserving the original order so nothing important gets reshuffled.
You control exactly how matching works: toggle case sensitivity, trim surrounding whitespace before comparing, drop blank lines, and optionally sort the results alphabetically. A second mode flips the job around to show duplicates only, so you can see precisely what was repeated. As you work, live counters report total lines, unique lines, and how many duplicates were found — handy when you need to deduplicate text or pull a clean unique lines extractor result from messy data. Load a .txt file to get started, then download or copy the cleaned output when you're done.
Every line is processed in your browser, so your lists and exports never leave your device. It pairs naturally with the Text Sorter to order the results, the Case Converter to normalize formatting first, or the Word Counter to measure what remains.
Paste your text with duplicate lines
Choose case sensitivity option
Click Remove Duplicates
Copy the cleaned text