ToolWren › Dedupe Lines

Remove Duplicate Lines

Remove duplicate lines from any list, keeping the first occurrence of each unique line.

100% client-side · nothing is uploaded

Loading tool…

How to use the Dedupe Lines

Type or paste your text into the Input box.
The converted result appears automatically in the output area — no button to press.
Review the output, then click Copy to copy it to your clipboard.
Edit the input at any time and the result updates live.

Privacy: this tool runs entirely in your browser. Your input is never sent to, received by, or stored on any server — there are no uploads and no tracking of what you enter.

About Dedupe Lines

Deduplicating lists

Paste a list and the tool keeps only the first occurrence of each line, dropping later repeats.

Order preserved

Unlike sorting, this keeps your original order, just without duplicates.

Where it helps

Cleaning email lists, keyword lists, logs and CSV columns.

Frequently asked questions

Does it keep order?

Yes — it keeps the first occurrence in place.

Is it case-sensitive?

Yes, lines must match exactly to count as duplicates.

Is my data uploaded?

No — it runs entirely in your browser.