OptiDrop

Remove Duplicate Lines Online — Free Text Deduplication Tool

Paste your text and remove duplicate lines instantly. Options for case-sensitive matching and alphabetical sorting. No upload, no sign-up — 100% free.

Original Lines
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Duplicates Removed
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Final Lines
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Free Online Remove Duplicate Lines Tool

OptiDrop's Remove Duplicate Lines tool helps you clean up text by removing repeated lines instantly. Whether you have a list of emails, URLs, names, or any other text data, this tool quickly identifies and removes duplicate entries while preserving the original order.

Case-Sensitive Matching

By default, the tool treats "Hello" and "hello" as the same line. Enable the case-sensitive option if you want exact character matching, where uppercase and lowercase versions of the same word are considered different entries.

Sort and Deduplicate

Enable the alphabetical sorting option to sort your unique lines from A to Z after removing duplicates. This is perfect for organizing lists, cleaning up data exports, or preparing text for further processing.

Frequently Asked Questions

Paste your text into our tool above and click "Remove Duplicates". The tool scans each line and removes any that appear more than once, keeping only the first occurrence. You can also enable case-sensitive matching if you want "Hello" and "hello" treated as different lines.
To deduplicate a list, paste your list items (one per line) into the input box and click "Remove Duplicates". The tool will keep only unique items and show you how many duplicates were removed. You can also sort the result alphabetically using the sort option.
Our tool shows you the original line count, number of duplicates found, and the final line count after deduplication. This makes it easy to see exactly how many duplicate lines existed in your text. Simply paste your text and the stats update automatically.
Enable the "Sort alphabetically" toggle in the options, then click "Remove Duplicates". The tool will first remove all duplicate lines and then sort the remaining unique lines in alphabetical order. This is perfect for cleaning up lists, email addresses, or any data that needs to be sorted and deduplicated.

Last updated: June 2026