Back to Tools
Remove Duplicate Lines
Remove Duplicate Lines
Detect and eliminate repeated lines from your text
0
0
0
About the Remove Duplicate Lines
Remove repeated lines from a list and keep only unique entries, with options to ignore case and whitespace.
How to use the Remove Duplicate Lines
- Paste your lines (or upload a file with File).
- Choose options: Case-insensitive, Trim whitespace and Ignore blank lines.
- Press Remove Duplicates, then Copy or save as .TXT.
Worked example
The list Apple, Banana, Apple, Cherry, banana becomes Apple, Banana, Cherry when Case-insensitive is on.
When to use the Remove Duplicate Lines
- Cleaning email lists, keyword lists and URL lists.
- Removing repeated lines from logs or exports.
- Preparing unique data for import into a spreadsheet or database.
Common mistakes to avoid
- Forgetting that uppercase and lowercase versions may be treated as different lines.
- Not trimming spaces first, so "apple" and "apple " look different.
Tips
- Use it to clean email lists, keyword lists and log files.
- The first occurrence of each line is kept and the original order is preserved.
Frequently Asked Questions
Use the Text Sorter tool after removing duplicates.
Yes. The first occurrence of each line stays where it was and later repeats are removed.