Deduplicate Text Fast, Without Mistakes
Removing duplicates from email lists, keyword lists, logs, or CSV columns comes up more often than you would think. This tool splits items by line (or comma/custom delimiter), keeps only the unique values, and shows "N total → M unique (K duplicates removed)" at a glance. Original, alphabetical, and frequency sorting make the result ready to use.
Beyond plain removal, three modes are available. "Dedupe" keeps unique values, "Duplicates" extracts only values appearing more than once, and "Unique only" pulls out values that appear exactly once. This is handy for finding repeat entries across two lists, or conversely isolating items that occur only a single time.
Ignore-case, trim, and remove-empty options let you fine-tune whether "Apple", "apple", and " apple " count as the same value. The subtle differences you constantly hit while cleaning data are resolved with a single toggle, cutting down on mistakes.
The duplicate-stats table below the result shows which values appeared and how often, by frequency ("banana ×5"). That goes beyond removal to help you understand what is duplicated and why. Everything runs in your browser, so even sensitive lists like customer emails stay private, and results can be copied or downloaded as .txt.