Remove Duplicate Lines
Paste text and remove duplicate lines instantly. Optionally sort lines or trim whitespace.
How to Use
- Paste your multi-line text into the input box — each line is treated as one entry.
- Toggle options: Case sensitive, Trim whitespace, or Sort result as needed.
- Click Remove Duplicates to see the deduplicated output and copy it with one click.
Frequently Asked Questions
- What does "Case sensitive" mean?
- When enabled, "Apple" and "apple" are treated as different lines. When disabled (default), they are considered duplicates and only one is kept.
- What does "Trim whitespace" do?
- Leading and trailing spaces on each line are stripped before comparison. This ensures lines that differ only in whitespace are correctly identified as duplicates.
- Can I sort the result alphabetically?
- Yes — enable the "Sort result" option and the output will be sorted in ascending alphabetical order after deduplication.
- Is there a line limit?
- No hard limit. All processing is done in your browser, so even large text files are handled quickly without uploading anything.