Duplicate Line Remover
Paste text into the Lines box and watch duplicates disappear as you type. Each line is kept the first time it appears; later copies of the same line are dropped, so order of first occurrences stays intact.
Updated 2026-08-03 · text
About this tool
This duplicate line remover splits your text on newlines, builds a unique set, and joins the survivors back together. Matching is exact per full line, including spaces. Empty lines count as values too, so a blank line appears at most once in the output.
How to use
- Open the tool: Load this page so the Lines textarea and live result panel appear.
- Paste your lines: Put one entry per line in the Lines box (sample starts with a, b, a, c).
- Watch unique output: The result updates automatically and keeps only the first of each repeated line.
- Copy the cleaned list: Select the result text and copy it into your spreadsheet, editor, or script.
Common use cases
- Clean a pasted list of emails, SKUs, or URLs so each entry appears only once.
- Deduplicate log snippets or export rows before you import them elsewhere.
- Collapse a messy checklist while keeping the order you first wrote each item.
Tips
- Exact line match matters; trailing spaces make two lines look different.
- First occurrence wins; rearrange source text if you prefer a different survivor.
FAQ
Does order stay the same?
Yes. Lines stay in the order of their first appearance; only later duplicates are removed.
Are blank lines removed?
A blank line is treated like any other value and kept once if it appears.
Is matching case-sensitive?
Yes. Apple and apple are different lines because the full line must match exactly.
Is my text uploaded?
Processing runs in your browser as you type; you do not need an account.