Paste a list and the tool removes repeated lines while keeping the original order. Ignore case and whitespace if needed, or output only the duplicates or only the unique lines.
Runs in your browser — data is not sent to a serverAlphabetically, numerically, by length, in reverse — or shuffled.
Add Prefix and Suffix to LinesAdd text to the start and end of every line: quotes, commas, tags.
Compare Two ListsIntersection, differences, and a deduplicated union of two lists.
Column ↔ Comma-Separated ListJoin a column into one comma-separated line or split it back.
We'll collect and tidy up website data: prices, products, contacts, reviews — in the format and at the frequency you need.