{ } How to use

Paste your list.
Select Process to keep only the first occurrence of each line.

{ } How it works

Remove Duplicate Lines works on the text you provide. Select Process ▸ and it runs entirely in your browser — nothing is uploaded to a server — then shows the result in the Output panel.

Input

Text input — paste or type your input in the left panel (use Sample for an example)

Output

TXT text — copy or download it from the Output panel.

{ } Common uses

De-duplicate a list of IDs, addresses or URLs.
Clean a log or an export that repeats rows.
Reduce a pasted column to its distinct values.

{ } Limitations

Lines must match exactly: case, punctuation and leading or trailing spaces all count, so Ada and "Ada " are two different lines. Run Remove Extra Whitespace first if the spacing is untidy.
A blank line is a line too, so only the first one survives and a spaced-out list comes back tightly packed.

{ } FAQ

Is my data uploaded to a server?

No. Everything runs locally in your browser — your files never leave your device.

Can I process more than one file at once?

This tool works on one input at a time.

Is this tool free?

Yes — it’s completely free and needs no sign-up.

Can I get only the lines that were duplicated?

Not with this tool; it returns the distinct list. Sort Lines first and the repeats sit next to each other, which makes them easy to see.