Paste any list or text to instantly remove duplicate lines, keeping the first occurrence of each.
Cleaning duplicate entries out of a list, log file, or email list by hand is tedious and error-prone. This tool scans your text line by line and removes repeats instantly, with options to control case sensitivity and whitespace trimming.
Everything runs locally in your browser — your data is never uploaded or stored.
It compares each line to the ones seen before. With "Trim whitespace" enabled, leading/trailing spaces are ignored; with "Case-sensitive" off, "Apple" and "apple" are treated as the same line.
It keeps the first occurrence of each unique line and removes any repeats that come after it, preserving the original order.
No. All processing happens locally in your browser using JavaScript. Nothing is sent to a server.
Yes, it works on any line-based text — lists, CSV rows treated as plain text, log files, or email lists.