Find Duplicates in a List

Paste your list below — one item per line. Instantly see every duplicate entry with its count, plus the clean de-duplicated set.

Your list (one item per line)

Case-insensitive Trim whitespace

Runs entirely in your browser. Nothing is uploaded.

How it works

STEP 1

Enter or paste any list of items, one value per line — names, emails, IDs, URLs, anything.

STEP 2

Toggle case-insensitive matching and auto-trim whitespace to catch near-duplicates.

STEP 3

See duplicates with counts and the unique list side by side. Copy either result with one click.