Remove Duplicate Lines – Free Online Text Tool

Remove duplicate lines

Remove duplicate lines from text in your browser. Keep the original order, ignore case, and trim whitespace. Copy the cleaned result.

Ignore case Trim whitespace Remove empty lines

Keep

First Last

Lines (0)

Result (0)

Processed locally

About this tool

This tool removes repeated lines from a block of text while keeping the order of the lines you keep. It’s useful for cleaning up lists, logs, exports and word lists where duplicates have crept in.

Options let you ignore case (so “Apple” and “apple” count as the same), trim surrounding whitespace before comparing, and choose whether to keep the first or last occurrence of each duplicate. The tool shows how many lines were kept and removed, and the result copies with one click.

Everything runs locally – your text never leaves your browser.

Frequently asked questions

Does it preserve the original order?

Yes – the remaining lines stay in their original order. To reorder them, use a sort tool afterwards.

What does “ignore case” do?

It treats lines that differ only in capitalization as duplicates, so “Hello” and “hello” collapse to one. The kept line retains its original capitalization.

What does “trim whitespace” do?

It removes spaces and tabs from the start and end of each line before comparing, so “apple” and “ apple ” are treated as the same line.

Keep first or last occurrence?

By default the first occurrence of each line is kept and later copies are removed. Switch to “Last” to retain the final occurrence instead – useful when later entries are the ones you want.

Is my text uploaded anywhere?

No. All processing happens in your browser, so your text never leaves your device.