Remove Duplicates from List
Remove duplicate lines from any list instantly. Supports trimming, case-insensitive matching, and sorting.
Features
- ✓Remove duplicate lines from any text or list
- ✓Trim whitespace to catch near-duplicates
- ✓Case-insensitive matching option
- ✓Automatically ignore empty lines
- ✓Sort output alphabetically (A-Z or Z-A)
- ✓Shows count of removed duplicates
How to Use
- 1Paste your list into the input field (one item per line)
- 2Toggle options like trim whitespace, case-insensitive, or ignore empty lines
- 3Choose a sort order or keep the original order
- 4The deduplicated list appears instantly in the output
- 5Copy the result using the Copy button
Examples
Input
apple banana apple cherry banana
Output
apple banana cherry
Input
Hello hello HELLO World
Output
Hello World
Input
foo foo bar bar
Output
foo bar
Input
cherry apple banana apple cherry
Output
apple banana cherry
How to Remove Duplicates from a List
Removing duplicates from a list is a common task when working with data exports, log files, email lists, keyword research, or any text that contains repeated lines. This tool scans your input line by line, identifies duplicates, and returns a clean list with only unique entries.
The trim whitespace option handles a frequent source of hidden duplicates. Lines like "apple" and " apple " look different but are semantically identical. With trimming enabled (the default), leading and trailing spaces are stripped before comparison, so these are correctly recognized as duplicates.
Case-insensitive mode treats "Hello", "hello", and "HELLO" as the same entry. When duplicates are found in this mode, the tool keeps the first occurrence and removes the rest. This is useful when working with lists where capitalization is inconsistent, such as CSV exports or manually entered data.
The sort option lets you reorder the output alphabetically (A-Z or Z-A) or keep the original order of first appearances. Sorting is applied after deduplication, so the result is both unique and organized. The "ignore empty lines" option strips blank lines from the output, keeping your list compact.
The tool displays a summary showing how many duplicates were removed — for example, "Removed 12 duplicates (47 → 35 lines)". All processing runs in your browser with no server calls, so your data stays private.