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Duplicate line remover

Paste your lines: duplicates vanish live, with counter and repeat list. Case, spacing and empty-line options.

Lines to analyse (one item per line)

Ignore case Ignore leading and trailing spaces Also remove empty lines Keep the last occurrence instead of the first

List without duplicates

How detection works

Two lines are duplicates when they become identical after options apply: case ignored, edge spaces removed. By default the first occurrence is kept at its original place; the “last occurrence” option keeps the position of the last appearance, useful when the end of the list is the most current.

The most repeated lines are shown with their occurrence count, to spot double entries fast. Text stays in your browser: no line is transmitted.

Common uses

Clean an e-mail list before import, deduplicate SEO keywords, merge shopping or contact lists, or check a data export. To sort the result, follow with the line sorter.