Remove Duplicate Lines

Paste your text (one item per line)

Case-insensitive Trim lines before comparison Keep last occurrence (otherwise keeps first) Duplicates detected per-line. Order preserved by default.

Result

About Remove Duplicate Lines

The Remove Duplicate Lines tool scans your pasted text line-by-line and removes repeated lines, keeping a single copy. You can choose case-insensitive matching, trim whitespace before comparison, and keep either the first or the last occurrence. This is ideal for cleaning lists, email addresses, product SKUs, or any bulk text where duplicates cause issues.

Example

Input:
apple
Banana
apple
banana
grape

Options: Case-insensitive = checked, Trim = checked, Keep last = unchecked
Output:
apple
Banana
grape

How to use it

Step 1: Paste your lines into the input box (one per line).
Step 2: Choose options: Case-insensitive, Trim lines, or Keep last occurrence.
Step 3: Click Remove Duplicate Lines and copy the cleaned list.

Who needs this?

This tool is useful for data entry specialists, virtual assistants, web researchers, SEO experts, and anyone who works with lists (emails, URLs, keywords, product SKUs). After deduplication, you may want to sort the list with Sort Text or remove empty entries using Remove Empty Lines.

Why use this tool?

Removing duplicates prevents double-processing, avoids repeated outreach, reduces upload errors, and produces cleaner CSVs and datasets for automation and analysis.