Which copy of a duplicate is kept?

The first occurrence. Every later line identical to one already seen is dropped, so the surviving lines stay in their original order rather than being shuffled.

Can it ignore case and spacing?

Yes. Turn on case-insensitive to treat 'Apple' and 'apple' as the same line, and ignore surrounding spaces to match lines that differ only by leading or trailing whitespace.

Does it sort the lines?

No. Deduplication preserves order. If you also want the result sorted, run it through the Alphabetical Sort tool, which has its own remove-duplicates option.

No. The whole operation runs in your browser as you type. Nothing is sent to a server.

Remove Duplicate Lines

Remove repeated lines from a list, keeping the first of each. Runs entirely in your browser.

Input

Result

Processed on your device. This file is never uploaded.

1Paste your list into the input box.
2Optionally ignore case or surrounding spaces.
3Copy the de-duplicated result.

De-duplicating a list

Paste a list and every line that repeats an earlier one is removed, leaving one of each in the order they first appeared. It is the quick fix for a merged list, an exported column, or any text where the same entry has crept in more than once.

Matching that fits the data

"Duplicate" is not always exact. The case-insensitive option treats differently-cased copies as the same, and ignoring surrounding spaces catches lines that differ only by stray whitespace — the two reasons a list looks deduplicated but is not. Everything runs on your device as you type.

Frequently asked questions

Random Text Generator

Word Counter

Character Counter

Remove Duplicate Lines

De-duplicating a list

Matching that fits the data

Frequently asked questions

What next?