Find before you remove
Use this duplicate line checker when you need to audit repeated emails, SKUs, keywords, URLs, IDs, or config values before changing the original list.
Example
email@example.com sales@example.com email@example.com
email@example.com 2 times lines 1, 3
FAQ
Can it show counts?
Yes. Use With counts to include how many times each duplicate appears.
Can it show only once-only lines?
Yes. Once only returns values that appear exactly one time.
Can I ignore case?
Yes. Enable Ignore case to treat different capitalization as the same line.