Duplicate Line Remover
Remove duplicate lines from any list instantly
About Duplicate Line Remover
How Duplicate Line Remover Works
Paste a list and it returns only unique lines, with optional sort, trim, and case-insensitive matching in your browser. Processing is client-side, so your data never leaves the device.
The Duplicate Line Remover strips repeated lines from any list and returns only the unique entries, with options to sort, trim whitespace, and ignore case. A typical use case is cleaning a pasted list of emails, IDs, or URLs so each appears once before importing it somewhere. Processing is local, so the list never leaves your browser, which is important for private contact data. It turns a messy copy-paste into a tidy dataset in a click, and the trim and case options prevent near-duplicates from slipping through. Analysts and developers use it constantly when merging exports from different systems.
Frequently asked questions
Can it ignore case and whitespace?+
Yes. You can trim spaces and treat differently cased lines as duplicates.
Will it sort the output?+
Optionally. You can sort while removing duplicates or keep the original order.
Is my list uploaded?+
No. All processing happens in your browser.
Limitations
It compares whole lines only and does not do fuzzy or partial matching between similar entries.