Line Deduper & Sorter
Cleaning exported lists? Paste them here to remove duplicate lines, trim stray spaces, delete empty lines, shuffle or sort — and get an exact before/after count.
Why deduplicating by hand always fails
Duplicate lists sneak into every workflow: merged contact exports, email campaigns run twice, log files collected over a weekend, keyword research pasted from three tabs. Human eyes miss "Acme Inc." vs "Acme Inc" because the invisible trailing space makes them different strings. This tool normalises first (trimming, optional case-folding), then deduplicates with a hash set, which stays fast even on lists of a hundred thousand lines.
Because everything runs in browser memory, pasting a customer list or an internal dump carries the same privacy profile as using a spreadsheet offline — nothing crosses the network. Use keep original order when sequence matters (changelogs, playlists) and sort A → Z when you want items grouped for review.
FAQ
- What counts as a duplicate?
- Two lines that are identical after your chosen normalisation. Enable "match case-insensitively" to treat "Apple" and "apple" as the same.
- How big can the list be?
- The hash-set approach deduplicates 100,000+ lines in well under a second on a typical laptop.
- Is my list uploaded?
- No. The page has no backend; pasting never sends a request.