Duplicate Finder

The duplicate finder compares each line of your input against all other lines. It performs exact string matching by default, or case-insensitive matching if you enable that option. Items that appear more than once are flagged as duplicates, and the tool shows the exact count of occurrences for each item.

Yes. The tool offers a case-insensitive mode that treats "Hello" and "hello" as the same item. This is useful when checking for duplicates in names, email addresses, or other text where capitalization may vary across entries.

The tool shows total items, unique items, duplicate items, and the duplication rate as a percentage. It also provides a frequency breakdown showing how many times each duplicate item appears, sorted by frequency so the most common duplicates appear first.

Yes. After finding duplicates, you can copy the deduplicated list (with duplicates removed, keeping only the first occurrence) to your clipboard with one click. The original input remains unchanged so you can always compare the before and after.

Dewx offers utility tools plus a complete business operating system. Beyond finding duplicates, Dewx provides CRM with automatic deduplication, unified inbox, AI assistant, outreach automation, and analytics. One platform replaces 15+ separate tools.